diff --git a/spine-cpp/spine-cpp/include/spine/BoneData.h b/spine-cpp/spine-cpp/include/spine/BoneData.h
index 8a1361a23..c8916b434 100644
--- a/spine-cpp/spine-cpp/include/spine/BoneData.h
+++ b/spine-cpp/spine-cpp/include/spine/BoneData.h
@@ -64,6 +64,8 @@ namespace spine {
 
 		friend class TranslateYTimeline;
 
+		friend class Slot;
+
 	public:
 		BoneData(int index, const String &name, BoneData *parent = NULL);
 
diff --git a/spine-cpp/spine-cpp/include/spine/PosedData.h b/spine-cpp/spine-cpp/include/spine/PosedData.h
index 00871d446..386e4653b 100644
--- a/spine-cpp/spine-cpp/include/spine/PosedData.h
+++ b/spine-cpp/spine-cpp/include/spine/PosedData.h
@@ -60,6 +60,7 @@ namespace spine {
         friend class TranslateYTimeline;
         friend class InheritTimeline;
         friend class Skeleton;
+        friend class Slot;
 
     public:
         PosedData(const spine::String& name);
@@ -117,6 +118,7 @@ namespace spine {
         friend class PhysicsConstraintMassTimeline;
         friend class PhysicsConstraintWindTimeline;
         friend class PhysicsConstraintGravityTimeline;
+        friend class Slot;
 
     protected:
         P _setup;
diff --git a/spine-cpp/spine-cpp/include/spine/SliderData.h b/spine-cpp/spine-cpp/include/spine/SliderData.h
index 77df7369b..c8db306fa 100644
--- a/spine-cpp/spine-cpp/include/spine/SliderData.h
+++ b/spine-cpp/spine-cpp/include/spine/SliderData.h
@@ -42,9 +42,7 @@ namespace spine {
 	class Slider;
 	class Skeleton;
 
-	/// Stores the setup pose for a PhysicsConstraint.
-	///
-	/// See https://esotericsoftware.com/spine-physics-constraints Physics constraints in the Spine User Guide.
+	/// Stores the setup pose for a Slider
 	class SP_API SliderData : public ConstraintDataGeneric<Slider, SliderPose> {
 		friend class SkeletonBinary;
 		friend class SkeletonJson;
diff --git a/spine-cpp/spine-cpp/include/spine/SlotData.h b/spine-cpp/spine-cpp/include/spine/SlotData.h
index 456b2f28a..ef63bc85d 100644
--- a/spine-cpp/spine-cpp/include/spine/SlotData.h
+++ b/spine-cpp/spine-cpp/include/spine/SlotData.h
@@ -62,6 +62,7 @@ namespace spine {
 		friend class TransformConstraintTimeline;
 		friend class TranslateTimeline;
 		friend class TwoColorTimeline;
+		friend class Slot;
 
 	public:
 		SlotData(int index, const String& name, BoneData& boneData);
diff --git a/spine-cpp/spine-cpp/src/spine/Slot.cpp b/spine-cpp/spine-cpp/src/spine/Slot.cpp
index e40c7bde0..261783e4e 100644
--- a/spine-cpp/spine-cpp/src/spine/Slot.cpp
+++ b/spine-cpp/spine-cpp/src/spine/Slot.cpp
@@ -39,7 +39,7 @@ using namespace spine;
 
 Slot::Slot(SlotData &data, Skeleton &skeleton) : PosedGeneric<SlotData, SlotPose, SlotPose>(data),
 												 _skeleton(skeleton),
-												 _bone(*skeleton.getBones()[data.getBoneData().getIndex()]),
+												 _bone(*skeleton.getBones()[data._boneData._index]),
 												 _attachmentState(0) {
 
 	if (data.getSetupPose().hasDarkColor()) {
@@ -49,19 +49,18 @@ Slot::Slot(SlotData &data, Skeleton &skeleton) : PosedGeneric<SlotData, SlotPose
 	setupPose();
 }
 
-
 Bone &Slot::getBone() {
 	return _bone;
 }
 
 void Slot::setupPose() {
-	_pose.getColor().set(_data.getSetupPose().getColor());
-	if (_pose.hasDarkColor()) _pose.getDarkColor().set(_data.getSetupPose().getDarkColor());
-	_pose.setSequenceIndex(_data.getSetupPose().getSequenceIndex());
-	if (_data.getAttachmentName().isEmpty())
+	_pose._color.set(_data._setup._color);
+	if (_pose._hasDarkColor) _pose._darkColor.set(_data._setup._darkColor);
+	_pose._sequenceIndex = _data._setup._sequenceIndex;
+	if (_data._attachmentName.isEmpty())
 		_pose.setAttachment(NULL);
 	else {
-		_pose.setAttachment(NULL);
-		_pose.setAttachment(_skeleton.getAttachment(_data.getIndex(), _data.getAttachmentName()));
+		_pose._attachment = NULL;
+		_pose.setAttachment(_skeleton.getAttachment(_data._index, _data._attachmentName));
 	}
-}
\ No newline at end of file
+}
diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SliderData.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SliderData.java
index d51893b6c..ff3f76a4f 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SliderData.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SliderData.java
@@ -33,9 +33,7 @@ import com.badlogic.gdx.utils.Null;
 
 import com.esotericsoftware.spine.TransformConstraintData.FromProperty;
 
-/** Stores the setup pose for a {@link PhysicsConstraint}.
- * <p>
- * See <a href="https://esotericsoftware.com/spine-physics-constraints">Physics constraints</a> in the Spine User Guide. */
+/** Stores the setup pose for a {@link Slider}.  */
 public class SliderData extends ConstraintData<Slider, SliderPose> {
 	Animation animation;
 	boolean additive, loop;