diff --git a/aegisub/build/libaegisub/libaegisub.vcxproj b/aegisub/build/libaegisub/libaegisub.vcxproj
index 9242f69ea..a73a35119 100644
--- a/aegisub/build/libaegisub/libaegisub.vcxproj
+++ b/aegisub/build/libaegisub/libaegisub.vcxproj
@@ -67,6 +67,7 @@
     <ClInclude Include="$(SrcDir)include\libaegisub\of_type_adaptor.h" />
     <ClInclude Include="$(SrcDir)include\libaegisub\option.h" />
     <ClInclude Include="$(SrcDir)include\libaegisub\option_value.h" />
+    <ClInclude Include="$(SrcDir)include\libaegisub\owning_intrusive_list.h" />
     <ClInclude Include="$(SrcDir)include\libaegisub\path.h" />
     <ClInclude Include="$(SrcDir)include\libaegisub\scoped_ptr.h" />
     <ClInclude Include="$(SrcDir)include\libaegisub\signal.h" />
diff --git a/aegisub/build/libaegisub/libaegisub.vcxproj.filters b/aegisub/build/libaegisub/libaegisub.vcxproj.filters
index 1c487e2cc..a73b5aaf7 100644
--- a/aegisub/build/libaegisub/libaegisub.vcxproj.filters
+++ b/aegisub/build/libaegisub/libaegisub.vcxproj.filters
@@ -161,6 +161,9 @@
     <ClInclude Include="$(SrcDir)include\libaegisub\kana_table.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="$(SrcDir)include\libaegisub\owning_intrusive_list.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="$(SrcDir)windows\lagi_pre.cpp">
diff --git a/aegisub/libaegisub/include/libaegisub/owning_intrusive_list.h b/aegisub/libaegisub/include/libaegisub/owning_intrusive_list.h
new file mode 100644
index 000000000..d5b88e1b5
--- /dev/null
+++ b/aegisub/libaegisub/include/libaegisub/owning_intrusive_list.h
@@ -0,0 +1,92 @@
+// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+//
+// Aegisub Project http://www.aegisub.org/
+
+#pragma once
+
+#include <boost/intrusive/list.hpp>
+
+namespace agi {
+
+template<typename T>
+class owning_intrusive_list : private boost::intrusive::make_list<T, boost::intrusive::constant_time_size<false>>::type {
+	typedef typename boost::intrusive::make_list<T, boost::intrusive::constant_time_size<false>>::type base;
+public:
+	using base::back;
+	using base::begin;
+	using base::cbegin;
+	using base::cend;
+	using base::crbegin;
+	using base::crend;
+	using base::empty;
+	using base::end;
+	using base::front;
+	using base::insert;
+	using base::iterator_to;
+	using base::merge;
+	using base::push_back;
+	using base::push_front;
+	using base::rbegin;
+	using base::rend;
+	using base::reverse;
+	using base::s_iterator_to;
+	using base::shift_backwards;
+	using base::shift_forward;
+	using base::size;
+	using base::sort;
+	using base::splice;
+	using base::swap;
+
+	using typename base::const_node_ptr;
+	using typename base::const_pointer;
+	using typename base::const_reverse_iterator;
+	using typename base::node;
+	using typename base::node_algorithms;
+	using typename base::node_ptr;
+	using typename base::node_traits;
+	using typename base::pointer;
+	using typename base::reference;
+	using typename base::reverse_iterator;
+	using typename base::size_type;
+	using typename base::value_type;
+	using typename base::iterator;
+	using typename base::const_iterator;
+	using typename base::const_reference;
+	using typename base::difference_type;
+
+	iterator erase(const_iterator b, const_iterator e) { return this->erase_and_dispose(b, e, [](T *e) { delete e; }); }
+	iterator erase(const_iterator b, const_iterator e, difference_type n) { return this->erase_and_dispose(b, e, n, [](T *e) { delete e; }); }
+	iterator erase(const_iterator i) { return this->erase_and_dispose(i, [](T *e) { delete e; }); }
+	void clear() { this->clear_and_dispose([](T *e) { delete e; }); }
+	void pop_back() { this->pop_back_and_dispose([](T *e) { delete e; }); }
+	void pop_front() { this->pop_front_and_dispose([](T *e) { delete e; }); }
+	void remove(const_reference value) { return this->remove_and_dispose(value, [](T *e) { delete e; }); }
+	void unique() { this->unique_and_dispose([](T *e) { delete e; }); }
+
+	template<class Pred> void remove_if(Pred&& pred) {
+		this->remove_if_and_dispose(std::forward<Pred>(pred), [](T *e) { delete e; });
+	}
+
+	template<class BinaryPredicate> void unique(BinaryPredicate&& pred) {
+		this->unique_and_dispose(std::forward<BinaryPredicate>(pred), [](T *e) { delete e; });
+	}
+
+	~owning_intrusive_list() {
+		clear();
+	}
+};
+
+}
+
diff --git a/aegisub/src/visual_feature.cpp b/aegisub/src/visual_feature.cpp
index 250ba1d61..2a94edd89 100644
--- a/aegisub/src/visual_feature.cpp
+++ b/aegisub/src/visual_feature.cpp
@@ -40,7 +40,7 @@
 VisualDraggableFeature::VisualDraggableFeature()
 : type(DRAG_NONE)
 , layer(0)
-, line(0)
+, line(nullptr)
 {
 }
 
diff --git a/aegisub/src/visual_feature.h b/aegisub/src/visual_feature.h
index 425c43f26..ef4c935b5 100644
--- a/aegisub/src/visual_feature.h
+++ b/aegisub/src/visual_feature.h
@@ -36,6 +36,8 @@
 
 #include "vector2d.h"
 
+#include <boost/intrusive/list_hook.hpp>
+
 class OpenGLWrapper;
 class AssDialogue;
 
@@ -54,7 +56,7 @@ enum DraggableFeatureType {
 ///
 /// By itself this class doesn't do much. It mostly just draws itself at a
 /// specified position and performs hit-testing.
-class VisualDraggableFeature {
+class VisualDraggableFeature : public boost::intrusive::make_list_base_hook<boost::intrusive::link_mode<boost::intrusive::auto_unlink>>::type {
 	Vector2D start; ///< position before the last drag operation began
 
 public:
diff --git a/aegisub/src/visual_tool.cpp b/aegisub/src/visual_tool.cpp
index cec2e15a0..82c87105d 100644
--- a/aegisub/src/visual_tool.cpp
+++ b/aegisub/src/visual_tool.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, Thomas Goyne <plorkyeran@aegisub.org>
+// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
 //
 // Permission to use, copy, modify, and distribute this software for any
 // purpose with or without fee is hereby granted, provided that the above
@@ -43,7 +43,12 @@
 
 using std::placeholders::_1;
 
-const wxColour VisualToolBase::colour[4] = {wxColour(106,32,19), wxColour(255,169,40), wxColour(255,253,185), wxColour(187,0,0)};
+const wxColour VisualToolBase::colour[] = {
+	wxColour(106,32,19),
+	wxColour(255,169,40),
+	wxColour(255,253,185),
+	wxColour(187,0,0)
+};
 
 VisualToolBase::VisualToolBase(VideoDisplay *parent, agi::Context *context)
 : c(context)
@@ -165,8 +170,8 @@ template<class FeatureType>
 VisualTool<FeatureType>::VisualTool(VideoDisplay *parent, agi::Context *context)
 : VisualToolBase(parent, context)
 , sel_changed(false)
+, active_feature(nullptr)
 {
-	active_feature = features.begin();
 }
 
 template<class FeatureType>
@@ -179,30 +184,21 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 
 	mouse_pos = event.GetPosition();
 
-	bool need_render = false;
-
 	if (event.Leaving()) {
 		mouse_pos = Vector2D();
 		parent->Render();
 		return;
 	}
 
-	if (event.Entering() && OPT_GET("Tool/Visual/Autohide")->GetBool())
-		need_render = true;
-
 	if (!dragging) {
-		feature_iterator prev_feature = active_feature;
-
 		int max_layer = INT_MIN;
-		active_feature = features.end();
-		for (feature_iterator cur = features.begin(); cur != features.end(); ++cur) {
-			if (cur->IsMouseOver(mouse_pos) && cur->layer >= max_layer) {
-				active_feature = cur;
-				max_layer = cur->layer;
+		active_feature = nullptr;
+		for (auto& feature : features) {
+			if (feature.IsMouseOver(mouse_pos) && feature.layer >= max_layer) {
+				active_feature = &feature;
+				max_layer = feature.layer;
 			}
 		}
-
-		need_render |= active_feature != prev_feature;
 	}
 
 	if (dragging) {
@@ -213,14 +209,13 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 			for (auto sel : sel_features)
 				UpdateDrag(sel);
 			Commit();
-			need_render = true;
 		}
 		// end drag
 		else {
 			dragging = false;
 
 			// mouse didn't move, fiddle with selection
-			if (active_feature != features.end() && !active_feature->HasMoved()) {
+			if (active_feature && !active_feature->HasMoved()) {
 				// Don't deselect stuff that was selected in this click's mousedown event
 				if (!sel_changed) {
 					if (ctrl_down)
@@ -230,7 +225,7 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 				}
 			}
 
-			active_feature = features.end();
+			active_feature = nullptr;
 			parent->ReleaseMouse();
 			parent->SetFocus();
 		}
@@ -244,7 +239,6 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 		}
 
 		UpdateHold();
-		need_render = true;
 		Commit();
 
 	}
@@ -252,7 +246,7 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 		drag_start = mouse_pos;
 
 		// start drag
-		if (active_feature != features.end()) {
+		if (active_feature) {
 			if (!sel_features.count(active_feature)) {
 				sel_changed = true;
 				SetSelection(active_feature, !ctrl_down);
@@ -276,7 +270,6 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 				SubtitleSelection sel;
 				sel.insert(c->selectionController->GetActiveLine());
 				c->selectionController->SetSelectedSet(sel);
-				need_render = true;
 			}
 			if (active_line && InitializeHold()) {
 				holding = true;
@@ -288,8 +281,7 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 	if (active_line && left_double)
 		OnDoubleClick();
 
-	//if (need_render)
-		parent->Render();
+	parent->Render();
 
 	// Only coalesce the changes made in a single drag
 	if (!event.LeftIsDown())
@@ -299,19 +291,19 @@ void VisualTool<FeatureType>::OnMouseEvent(wxMouseEvent &event) {
 template<class FeatureType>
 void VisualTool<FeatureType>::DrawAllFeatures() {
 	gl.SetLineColour(colour[0], 1.0f, 2);
-	for (feature_iterator cur = features.begin(); cur != features.end(); ++cur) {
+	for (auto& feature : features) {
 		int fill = 1;
-		if (cur == active_feature)
+		if (&feature == active_feature)
 			fill = 2;
-		else if (sel_features.count(cur))
+		else if (sel_features.count(&feature))
 			fill = 3;
 		gl.SetFillColour(colour[fill], 0.6f);
-		cur->Draw(gl);
+		feature.Draw(gl);
 	}
 }
 
 template<class FeatureType>
-void VisualTool<FeatureType>::SetSelection(feature_iterator feat, bool clear) {
+void VisualTool<FeatureType>::SetSelection(FeatureType *feat, bool clear) {
 	if (clear)
 		sel_features.clear();
 
@@ -325,12 +317,10 @@ void VisualTool<FeatureType>::SetSelection(feature_iterator feat, bool clear) {
 }
 
 template<class FeatureType>
-void VisualTool<FeatureType>::RemoveSelection(feature_iterator feat) {
+void VisualTool<FeatureType>::RemoveSelection(FeatureType *feat) {
 	if (!sel_features.erase(feat) || !feat->line) return;
-
-	for (auto sel : sel_features) {
+	for (auto sel : sel_features)
 		if (sel->line == feat->line) return;
-	}
 
 	SubtitleSelection sel = c->selectionController->GetSelectedSet();
 
diff --git a/aegisub/src/visual_tool.h b/aegisub/src/visual_tool.h
index 967fcd51e..4706e5502 100644
--- a/aegisub/src/visual_tool.h
+++ b/aegisub/src/visual_tool.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, Thomas Goyne <plorkyeran@aegisub.org>
+// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
 //
 // Permission to use, copy, modify, and distribute this software for any
 // purpose with or without fee is hereby granted, provided that the above
@@ -20,22 +20,17 @@
 
 #pragma once
 
-#include <deque>
-#include <list>
-#include <map>
-#include <set>
-#include <vector>
-
-#include <boost/container/list.hpp>
-
-#include <wx/event.h>
-
-#include <libaegisub/signal.h>
-
 #include "gl_wrap.h"
 #include "selection_controller.h"
 #include "vector2d.h"
 
+#include <libaegisub/owning_intrusive_list.h>
+#include <libaegisub/signal.h>
+
+#include <deque>
+#include <set>
+#include <wx/event.h>
+
 class AssDialogue;
 class SubtitlesGrid;
 class VideoDisplay;
@@ -155,21 +150,9 @@ template<class FeatureType>
 class VisualTool : public VisualToolBase {
 protected:
 	typedef FeatureType Feature;
-	typedef typename boost::container::list<FeatureType>::iterator feature_iterator;
-	typedef typename boost::container::list<FeatureType>::const_iterator feature_const_iterator;
+	typedef agi::owning_intrusive_list<FeatureType> feature_list;
 
 private:
-	struct ltaddr {
-		template<class T>
-		bool operator()(T lft, T rgt) const {
-			return &*lft < &*rgt;
-		}
-	};
-
-	boost::container::list<agi::signal::Connection> slots;
-
-	typedef typename std::set<feature_iterator, ltaddr>::iterator selection_iterator;
-
 	bool sel_changed; /// Has the selection already been changed in the current click?
 
 	/// @brief Called when a hold is begun
@@ -181,23 +164,22 @@ private:
 	/// @brief Called at the beginning of a drag
 	/// @param feature The visual feature clicked on
 	/// @return Should the drag happen?
-	virtual bool InitializeDrag(feature_iterator feature) { return true; }
+	virtual bool InitializeDrag(FeatureType *feature) { return true; }
 	/// @brief Called on every mouse event during a drag
 	/// @param feature The current feature to process; not necessarily the one clicked on
-	virtual void UpdateDrag(feature_iterator feature) { }
+	virtual void UpdateDrag(FeatureType *feature) { }
 
 	/// @brief Draw stuff
 	virtual void Draw()=0;
 
 protected:
-	std::set<feature_iterator, ltaddr> sel_features; ///< Currently selected visual features
-	typedef typename std::set<feature_iterator, ltaddr>::const_iterator sel_iterator;
+	std::set<FeatureType *> sel_features; ///< Currently selected visual features
 
 	/// Topmost feature under the mouse; generally only valid during a drag
-	feature_iterator active_feature;
+	FeatureType *active_feature;
 	/// List of features which are drawn and can be clicked on
 	/// List is used here for the iterator invalidation properties
-	boost::container::list<FeatureType> features;
+	feature_list features;
 
 	/// Draw all of the features in the list
 	void DrawAllFeatures();
@@ -205,11 +187,11 @@ protected:
 	/// @brief Remove a feature from the selection
 	/// @param i Index in the feature list
 	/// Also deselects lines if all features for that line have been deselected
-	void RemoveSelection(feature_iterator feat);
+	void RemoveSelection(FeatureType *feat);
 
 	/// @brief Set the selection to a single feature, deselecting everything else
 	/// @param i Index in the feature list
-	void SetSelection(feature_iterator feat, bool clear);
+	void SetSelection(FeatureType *feat, bool clear);
 
 public:
 	/// @brief Handler for all mouse events
diff --git a/aegisub/src/visual_tool_clip.cpp b/aegisub/src/visual_tool_clip.cpp
index a5dd5552b..8cef3258f 100644
--- a/aegisub/src/visual_tool_clip.cpp
+++ b/aegisub/src/visual_tool_clip.cpp
@@ -36,18 +36,11 @@ VisualToolClip::VisualToolClip(VideoDisplay *parent, agi::Context *context)
 , cur_2(video_res)
 , inverse(false)
 {
-	Feature feat;
-	feat.type = DRAG_SMALL_CIRCLE;
-	features.resize(4, feat);
-
-	// This is really awkward without being able to just index the list of
-	// features, so copy them into a temporary array
 	ClipCorner *feats[4];
-	feature_iterator cur = features.begin();
-	feats[0] = &*(cur++);
-	feats[1] = &*(cur++);
-	feats[2] = &*(cur++);
-	feats[3] = &*(cur++);
+	for (size_t i = 0; i < 4; ++i) {
+		feats[i] = new ClipCorner;
+		features.push_back(*feats[i]);
+	}
 
 	// Attach each feature to the two features it shares edges with
 	// Top-left
@@ -123,11 +116,7 @@ void VisualToolClip::CommitHold() {
 	}
 }
 
-bool VisualToolClip::InitializeDrag(feature_iterator) {
-	return true;
-}
-
-void VisualToolClip::UpdateDrag(feature_iterator feature) {
+void VisualToolClip::UpdateDrag(ClipCorner *feature) {
 	// Update features which share an edge with the dragged one
 	feature->horiz->pos = Vector2D(feature->horiz->pos, feature->pos);
 	feature->vert->pos = Vector2D(feature->pos, feature->vert->pos);
@@ -139,7 +128,7 @@ void VisualToolClip::UpdateDrag(feature_iterator feature) {
 }
 
 void VisualToolClip::SetFeaturePositions() {
-	feature_iterator it = features.begin();
+	auto it = features.begin();
 	(it++)->pos = cur_1; // Top-left
 	(it++)->pos = Vector2D(cur_2, cur_1); // Top-right
 	(it++)->pos = Vector2D(cur_1, cur_2); // Bottom-left
diff --git a/aegisub/src/visual_tool_clip.h b/aegisub/src/visual_tool_clip.h
index 4da67e35c..96f744a90 100644
--- a/aegisub/src/visual_tool_clip.h
+++ b/aegisub/src/visual_tool_clip.h
@@ -26,7 +26,7 @@
 struct ClipCorner : public VisualDraggableFeature {
 	ClipCorner *horiz; ///< Other corner on this corner's horizontal line
 	ClipCorner *vert;  ///< Other corner on this corner's vertical line
-	ClipCorner() : VisualDraggableFeature() , horiz(0) , vert(0) { }
+	ClipCorner() : VisualDraggableFeature() , horiz(0) , vert(0) { type = DRAG_SMALL_CIRCLE; }
 };
 
 class VisualToolClip : public VisualTool<ClipCorner> {
@@ -42,8 +42,8 @@ class VisualToolClip : public VisualTool<ClipCorner> {
 	void DoRefresh();
 	void SetFeaturePositions();
 
-	bool InitializeDrag(feature_iterator feature);
-	void UpdateDrag(feature_iterator feature);
+	bool InitializeDrag(ClipCorner *feature) { return true; }
+	void UpdateDrag(ClipCorner *feature);
 
 	void Draw();
 public:
diff --git a/aegisub/src/visual_tool_drag.cpp b/aegisub/src/visual_tool_drag.cpp
index 9b2378f2d..a8b97e84a 100644
--- a/aegisub/src/visual_tool_drag.cpp
+++ b/aegisub/src/visual_tool_drag.cpp
@@ -32,6 +32,7 @@
 #include "video_display.h"
 
 #include <libaegisub/of_type_adaptor.h>
+#include <libaegisub/util.h>
 
 #include <algorithm>
 #include <boost/format.hpp>
@@ -47,7 +48,7 @@ static const DraggableFeatureType DRAG_END = DRAG_BIG_CIRCLE;
 
 VisualToolDrag::VisualToolDrag(VideoDisplay *parent, agi::Context *context)
 : VisualTool<VisualToolDragDraggableFeature>(parent, context)
-, primary(0)
+, primary(nullptr)
 , button_is_move(true)
 {
 	c->selectionController->GetSelectedSet(selection);
@@ -112,7 +113,7 @@ void VisualToolDrag::OnFileChanged() {
 	features.clear();
 	sel_features.clear();
 	primary = 0;
-	active_feature = features.end();
+	active_feature = nullptr;
 
 	for (auto diag : c->ass->Line | agi::of_type<AssDialogue>()) {
 		if (IsDisplayed(diag))
@@ -126,8 +127,8 @@ void VisualToolDrag::OnFrameChanged() {
 	if (primary && !IsDisplayed(primary->line))
 		primary = 0;
 
-	feature_iterator feat = features.begin();
-	feature_iterator end = features.end();
+	auto feat = features.begin();
+	auto end = features.end();
 
 	for (auto diag : c->ass->Line | agi::of_type<AssDialogue>()) {
 		if (IsDisplayed(diag)) {
@@ -141,9 +142,9 @@ void VisualToolDrag::OnFrameChanged() {
 		else {
 			// Remove all features for this line (if any)
 			while (feat != end && feat->line == diag) {
-				if (feat == active_feature) active_feature = features.end();
-				feat->line = 0;
-				RemoveSelection(feat);
+				if (&*feat == active_feature) active_feature = nullptr;
+				feat->line = nullptr;
+				RemoveSelection(&*feat);
 				feat = features.erase(feat);
 			}
 		}
@@ -151,21 +152,23 @@ void VisualToolDrag::OnFrameChanged() {
 }
 
 template<class C, class T> static bool line_not_present(C const& set, T const& it) {
-	return std::none_of(set.begin(), set.end(), [&](T const& cmp) { return cmp->line == it->line; });
+	return std::none_of(set.begin(), set.end(), [&](typename C::value_type const& cmp) {
+		return cmp->line == it->line;
+	});
 }
 
 void VisualToolDrag::OnSelectedSetChanged(const SubtitleSelection &added, const SubtitleSelection &removed) {
 	c->selectionController->GetSelectedSet(selection);
 
 	bool any_changed = false;
-	for (feature_iterator it = features.begin(); it != features.end(); ) {
+	for (auto it = features.begin(); it != features.end(); ) {
 		if (removed.count(it->line)) {
-			sel_features.erase(it++);
+			sel_features.erase(&*it++);
 			any_changed = true;
 		}
 		else {
 			if (added.count(it->line) && it->type == DRAG_START && line_not_present(sel_features, it)) {
-				sel_features.insert(it);
+				sel_features.insert(&*it);
 				any_changed = true;
 			}
 			++it;
@@ -180,11 +183,11 @@ void VisualToolDrag::Draw() {
 	DrawAllFeatures();
 
 	// Draw connecting lines
-	for (feature_iterator cur = features.begin(); cur != features.end(); ++cur) {
-		if (cur->type == DRAG_START) continue;
+	for (auto& feature : features) {
+		if (feature.type == DRAG_START) continue;
 
-		feature_iterator p2 = cur;
-		feature_iterator p1 = cur->parent;
+		Feature *p2 = &feature;
+		Feature *p1 = feature.parent;
 
 		// Move end marker has an arrow; origin doesn't
 		bool has_arrow = p2->type == DRAG_END;
@@ -221,51 +224,54 @@ void VisualToolDrag::MakeFeatures(AssDialogue *diag) {
 	MakeFeatures(diag, features.end());
 }
 
-void VisualToolDrag::MakeFeatures(AssDialogue *diag, feature_iterator pos) {
+void VisualToolDrag::MakeFeatures(AssDialogue *diag, feature_list::iterator pos) {
 	Vector2D p1 = FromScriptCoords(GetLinePosition(diag));
 
 	// Create \pos feature
-	Feature feat;
-	feat.pos = p1;
-	feat.layer = 0;
-	feat.type = DRAG_START;
-	feat.time = 0;
-	feat.line = diag;
-	feat.parent = features.end();
-	features.insert(pos, feat);
-	feature_iterator cur = prev(pos);
-	feat.parent = cur;
+	auto feat = agi::util::make_unique<Feature>();
+	auto parent = feat.get();
+	feat->pos = p1;
+	feat->type = DRAG_START;
+	feat->line = diag;
+
 	if (selection.count(diag))
-		sel_features.insert(cur);
+		sel_features.insert(feat.get());
+	features.insert(pos, *feat.release());
 
 	Vector2D p2;
 	int t1, t2;
 
 	// Create move destination feature
 	if (GetLineMove(diag, p1, p2, t1, t2)) {
-		feat.pos = FromScriptCoords(p2);
-		feat.layer = 1;
-		feat.type = DRAG_END;
-		feat.parent->time = t1;
-		feat.time = t2;
-		feat.line = diag;
-		features.insert(pos, feat);
-		feat.parent->parent = prev(pos);
+		feat = agi::util::make_unique<Feature>();
+		feat->pos = FromScriptCoords(p2);
+		feat->layer = 1;
+		feat->type = DRAG_END;
+		feat->time = t2;
+		feat->line = diag;
+		feat->parent = parent;
+
+		parent->time = t1;
+		parent->parent = feat.get();
+
+		features.insert(pos, *feat.release());
 	}
 
 	// Create org feature
 	if (Vector2D org = GetLineOrigin(diag)) {
-		feat.pos = FromScriptCoords(org);
-		feat.layer = -1;
-		feat.type = DRAG_ORIGIN;
-		feat.time = 0;
-		feat.line = diag;
-		features.insert(pos, feat);
+		feat = agi::util::make_unique<Feature>();
+		feat->pos = FromScriptCoords(org);
+		feat->layer = -1;
+		feat->type = DRAG_ORIGIN;
+		feat->time = 0;
+		feat->line = diag;
+		feat->parent = parent;
+		features.insert(pos, *feat.release());
 	}
 }
 
-bool VisualToolDrag::InitializeDrag(feature_iterator feature) {
-	primary = &*feature;
+bool VisualToolDrag::InitializeDrag(Feature *feature) {
+	primary = feature;
 
 	// Set time of clicked feature to the current frame and shift all other
 	// selected features by the same amount
@@ -279,17 +285,17 @@ bool VisualToolDrag::InitializeDrag(feature_iterator feature) {
 	return true;
 }
 
-void VisualToolDrag::UpdateDrag(feature_iterator feature) {
+void VisualToolDrag::UpdateDrag(Feature *feature) {
 	if (feature->type == DRAG_ORIGIN) {
 		SetOverride(feature->line, "\\org", ToScriptCoords(feature->pos).PStr());
 		return;
 	}
 
-	feature_iterator end_feature = feature->parent;
+	Feature *end_feature = feature->parent;
 	if (feature->type == DRAG_END)
 		std::swap(feature, end_feature);
 
-	if (feature->parent == features.end())
+	if (!feature->parent)
 		SetOverride(feature->line, "\\pos", ToScriptCoords(feature->pos).PStr());
 	else
 		SetOverride(feature->line, "\\move",
diff --git a/aegisub/src/visual_tool_drag.h b/aegisub/src/visual_tool_drag.h
index 6fc4d410a..464540f2c 100644
--- a/aegisub/src/visual_tool_drag.h
+++ b/aegisub/src/visual_tool_drag.h
@@ -27,8 +27,8 @@
 class VisualToolDragDraggableFeature : public VisualDraggableFeature {
 public:
 	int time;
-	boost::container::list<VisualToolDragDraggableFeature>::iterator parent;
-	VisualToolDragDraggableFeature() : VisualDraggableFeature(), time(0) { }
+	VisualToolDragDraggableFeature *parent;
+	VisualToolDragDraggableFeature() : VisualDraggableFeature(), time(0), parent(nullptr) { }
 };
 
 class wxBitmapButton;
@@ -54,7 +54,7 @@ class VisualToolDrag : public VisualTool<VisualToolDragDraggableFeature> {
 	/// @brief Create the features for a line
 	/// @param diag Line to create the features for
 	/// @param pos Insertion point in the feature list
-	void MakeFeatures(AssDialogue *diag, feature_iterator pos);
+	void MakeFeatures(AssDialogue *diag, feature_list::iterator pos);
 	void MakeFeatures(AssDialogue *diag);
 
 	void OnSelectedSetChanged(SubtitleSelection const& lines_added, SubtitleSelection const& lines_removed);
@@ -64,8 +64,8 @@ class VisualToolDrag : public VisualTool<VisualToolDragDraggableFeature> {
 	void OnLineChanged();
 	void OnCoordinateSystemsChanged() { OnFileChanged(); }
 
-	bool InitializeDrag(feature_iterator feature);
-	void UpdateDrag(feature_iterator feature);
+	bool InitializeDrag(Feature *feature);
+	void UpdateDrag(Feature *feature);
 	void Draw();
 	void OnDoubleClick();
 
diff --git a/aegisub/src/visual_tool_rotatexy.cpp b/aegisub/src/visual_tool_rotatexy.cpp
index 353d4a6e6..294dbf9bb 100644
--- a/aegisub/src/visual_tool_rotatexy.cpp
+++ b/aegisub/src/visual_tool_rotatexy.cpp
@@ -33,9 +33,9 @@ VisualToolRotateXY::VisualToolRotateXY(VideoDisplay *parent, agi::Context *conte
 , orig_x(0)
 , orig_y(0)
 {
-	features.resize(1);
-	org = &features.back();
+	org = new Feature;
 	org->type = DRAG_BIG_TRIANGLE;
+	features.push_back(*org);
 }
 
 void VisualToolRotateXY::Draw() {
@@ -161,7 +161,7 @@ void VisualToolRotateXY::UpdateHold() {
 	SetSelectedOverride("\\fry", str(boost::format("%.4g") % angle_y));
 }
 
-void VisualToolRotateXY::UpdateDrag(feature_iterator feature) {
+void VisualToolRotateXY::UpdateDrag(Feature *feature) {
 	SetOverride(active_line, "\\org", ToScriptCoords(feature->pos).PStr());
 }
 
diff --git a/aegisub/src/visual_tool_rotatexy.h b/aegisub/src/visual_tool_rotatexy.h
index 64c8d8d98..7b2a12c5c 100644
--- a/aegisub/src/visual_tool_rotatexy.h
+++ b/aegisub/src/visual_tool_rotatexy.h
@@ -34,7 +34,7 @@ class VisualToolRotateXY : public VisualTool<VisualDraggableFeature> {
 
 	void DoRefresh();
 	void Draw();
-	void UpdateDrag(feature_iterator feature);
+	void UpdateDrag(Feature *feature);
 	bool InitializeHold();
 	void UpdateHold();
 public:
diff --git a/aegisub/src/visual_tool_rotatez.cpp b/aegisub/src/visual_tool_rotatez.cpp
index 8ff490953..ae83a948a 100644
--- a/aegisub/src/visual_tool_rotatez.cpp
+++ b/aegisub/src/visual_tool_rotatez.cpp
@@ -36,9 +36,9 @@ VisualToolRotateZ::VisualToolRotateZ(VideoDisplay *parent, agi::Context *context
 , orig_angle(0)
 , rotation_x(0)
 , rotation_y(0)
+, org(new Feature)
 {
-	features.resize(1);
-	org = &features.back();
+	features.push_back(*org);
 	org->type = DRAG_BIG_TRIANGLE;
 }
 
@@ -118,7 +118,7 @@ void VisualToolRotateZ::UpdateHold() {
 	SetSelectedOverride("\\frz", str(boost::format("%.4g") % angle));
 }
 
-void VisualToolRotateZ::UpdateDrag(feature_iterator feature) {
+void VisualToolRotateZ::UpdateDrag(Feature *feature) {
 	SetOverride(active_line, "\\org", ToScriptCoords(feature->pos).PStr());
 }
 
diff --git a/aegisub/src/visual_tool_rotatez.h b/aegisub/src/visual_tool_rotatez.h
index 9cdb627ba..753148333 100644
--- a/aegisub/src/visual_tool_rotatez.h
+++ b/aegisub/src/visual_tool_rotatez.h
@@ -36,7 +36,7 @@ class VisualToolRotateZ : public VisualTool<VisualDraggableFeature> {
 	bool InitializeHold();
 	void UpdateHold();
 
-	void UpdateDrag(feature_iterator feature);
+	void UpdateDrag(Feature *feature);
 
 	void DoRefresh();
 
diff --git a/aegisub/src/visual_tool_vector_clip.cpp b/aegisub/src/visual_tool_vector_clip.cpp
index 600f337a9..f06878f37 100644
--- a/aegisub/src/visual_tool_vector_clip.cpp
+++ b/aegisub/src/visual_tool_vector_clip.cpp
@@ -29,6 +29,8 @@
 #include "selection_controller.h"
 #include "utils.h"
 
+#include <libaegisub/util.h>
+
 #include <algorithm>
 #include <wx/toolbar.h>
 
@@ -111,7 +113,7 @@ void VisualToolVectorClip::Draw() {
 	spline.GetClosestParametricPoint(mouse_pos, highlighted_curve, t, pt);
 
 	// Draw highlighted line
-	if ((mode == 3 || mode == 4) && active_feature == features.end() && points.size() > 2) {
+	if ((mode == 3 || mode == 4) && !active_feature && points.size() > 2) {
 		std::vector<float> highlighted_points;
 		spline.GetPointList(highlighted_points, highlighted_curve);
 		if (!highlighted_points.empty()) {
@@ -148,42 +150,47 @@ void VisualToolVectorClip::Draw() {
 }
 
 void VisualToolVectorClip::MakeFeature(Spline::iterator cur) {
-	Feature feat;
-	feat.curve = cur;
+	auto feat = agi::util::make_unique<Feature>();
+	feat->curve = cur;
 
 	if (cur->type == SplineCurve::POINT) {
-		feat.pos = cur->p1;
-		feat.type = DRAG_SMALL_CIRCLE;
-		feat.point = 0;
+		feat->pos = cur->p1;
+		feat->type = DRAG_SMALL_CIRCLE;
+		feat->point = 0;
 	}
 	else if (cur->type == SplineCurve::LINE) {
-		feat.pos = cur->p2;
-		feat.type = DRAG_SMALL_CIRCLE;
-		feat.point = 1;
+		feat->pos = cur->p2;
+		feat->type = DRAG_SMALL_CIRCLE;
+		feat->point = 1;
 	}
 	else if (cur->type == SplineCurve::BICUBIC) {
 		// Control points
-		feat.pos = cur->p2;
-		feat.point = 1;
-		feat.type = DRAG_SMALL_SQUARE;
-		features.push_back(feat);
+		feat->pos = cur->p2;
+		feat->point = 1;
+		feat->type = DRAG_SMALL_SQUARE;
+		features.push_back(*feat.release());
 
-		feat.pos = cur->p3;
-		feat.point = 2;
-		features.push_back(feat);
+		feat = agi::util::make_unique<Feature>();
+		feat->curve = cur;
+		feat->pos = cur->p3;
+		feat->point = 2;
+		feat->type = DRAG_SMALL_SQUARE;
+		features.push_back(*feat.release());
 
 		// End point
-		feat.pos = cur->p4;
-		feat.type = DRAG_SMALL_CIRCLE;
-		feat.point = 3;
+		feat = agi::util::make_unique<Feature>();
+		feat->curve = cur;
+		feat->pos = cur->p4;
+		feat->point = 3;
+		feat->type = DRAG_SMALL_CIRCLE;
 	}
-	features.push_back(feat);
+	features.push_back(*feat.release());
 }
 
 void VisualToolVectorClip::MakeFeatures() {
 	sel_features.clear();
 	features.clear();
-	active_feature = features.end();
+	active_feature = nullptr;
 	for (auto it = spline.begin(); it != spline.end(); ++it)
 		MakeFeature(it);
 }
@@ -202,12 +209,12 @@ void VisualToolVectorClip::Save() {
 	}
 }
 
-void VisualToolVectorClip::UpdateDrag(feature_iterator feature) {
+void VisualToolVectorClip::UpdateDrag(Feature *feature) {
 	spline.MovePoint(feature->curve, feature->point, feature->pos);
 	Save();
 }
 
-bool VisualToolVectorClip::InitializeDrag(feature_iterator feature) {
+bool VisualToolVectorClip::InitializeDrag(Feature *feature) {
 	if (mode != 5) return true;
 
 	if (feature->curve->type == SplineCurve::BICUBIC && (feature->point == 1 || feature->point == 2)) {
@@ -229,7 +236,7 @@ bool VisualToolVectorClip::InitializeDrag(feature_iterator feature) {
 
 		spline.erase(feature->curve);
 	}
-	active_feature = features.end();
+	active_feature = nullptr;
 
 	Save();
 	MakeFeatures();
@@ -313,16 +320,15 @@ bool VisualToolVectorClip::InitializeHold() {
 	if (mode == 6 || mode == 7) {
 		sel_features.clear();
 		features.clear();
-		active_feature = features.end();
+		active_feature = nullptr;
 		spline.clear();
 		spline.emplace_back(mouse_pos);
 		return true;
 	}
 
 	/// @todo box selection?
-	if (mode == 0) {
+	if (mode == 0)
 		return false;
-	}
 
 	// Nothing to do for mode 5 (remove)
 	return false;
@@ -398,6 +404,6 @@ void VisualToolVectorClip::DoRefresh() {
 
 void VisualToolVectorClip::SelectAll() {
 	sel_features.clear();
-	for (feature_iterator it = features.begin(); it != features.end(); ++it)
-		sel_features.insert(it);
+	for (auto& feature : features)
+		sel_features.insert(&feature);
 }
diff --git a/aegisub/src/visual_tool_vector_clip.h b/aegisub/src/visual_tool_vector_clip.h
index b3c232d06..ceaa72ae1 100644
--- a/aegisub/src/visual_tool_vector_clip.h
+++ b/aegisub/src/visual_tool_vector_clip.h
@@ -35,8 +35,8 @@ struct VisualToolVectorClipDraggableFeature : public VisualDraggableFeature {
 	int point;
 	/// @brief Constructor
 	VisualToolVectorClipDraggableFeature()
-		: VisualDraggableFeature()
-		, point(0)
+	: VisualDraggableFeature()
+	, point(0)
 	{ }
 };
 
@@ -59,8 +59,8 @@ class VisualToolVectorClip : public VisualTool<VisualToolVectorClipDraggableFeat
 	bool InitializeHold();
 	void UpdateHold();
 
-	void UpdateDrag(feature_iterator feature);
-	bool InitializeDrag(feature_iterator feature);
+	void UpdateDrag(Feature *feature);
+	bool InitializeDrag(Feature *feature);
 
 	void DoRefresh();
 	void Draw();