diff --git a/application/sources/component_preview_grid_widget.cc b/application/sources/component_preview_grid_widget.cc
index c6ca1ffd..fe969721 100644
--- a/application/sources/component_preview_grid_widget.cc
+++ b/application/sources/component_preview_grid_widget.cc
@@ -12,7 +12,14 @@ ComponentPreviewGridWidget::ComponentPreviewGridWidget(Document *document, QWidg
 
     connect(this, &ComponentPreviewGridWidget::doubleClicked, [this](const QModelIndex &index) {
         const SkeletonComponent *component = this->componentListModel()->modelIndexToComponent(index);
-        if (nullptr != component && !component->childrenIds.empty()) {
+        if (nullptr == component)
+            return;
+        if (component->childrenIds.empty()) {
+            std::vector<dust3d::Uuid> partIds;
+            this->m_document->collectComponentDescendantParts(component->id, partIds);
+            for (const auto &partId: partIds)
+                emit this->selectPartOnCanvas(partId);
+        } else {
             this->componentListModel()->setListingComponentId(component->id);
         }
     });
diff --git a/application/sources/component_preview_grid_widget.h b/application/sources/component_preview_grid_widget.h
index 7b22f3d7..2393d928 100644
--- a/application/sources/component_preview_grid_widget.h
+++ b/application/sources/component_preview_grid_widget.h
@@ -5,13 +5,17 @@
 #include <dust3d/base/uuid.h>
 #include <QAbstractListModel>
 #include "preview_grid_view.h"
+#include "component_list_model.h"
 
-class ComponentListModel;
 class Document;
 class SkeletonComponent;
 
 class ComponentPreviewGridWidget: public PreviewGridView
 {
+    Q_OBJECT
+signals:
+    void unselectAllOnCanvas();
+    void selectPartOnCanvas(const dust3d::Uuid &partId);
 public:
     ComponentPreviewGridWidget(Document *document, QWidget *parent=nullptr);
     ComponentListModel *componentListModel();
diff --git a/application/sources/part_manage_widget.cc b/application/sources/part_manage_widget.cc
index 353b0a39..6a189bfc 100644
--- a/application/sources/part_manage_widget.cc
+++ b/application/sources/part_manage_widget.cc
@@ -46,6 +46,8 @@ PartManageWidget::PartManageWidget(Document *document, QWidget *parent):
 
     connect(m_componentPreviewGridWidget->selectionModel(), &QItemSelectionModel::selectionChanged, this, &PartManageWidget::updateToolButtons);
     connect(m_componentPreviewGridWidget->componentListModel(), &ComponentListModel::listingComponentChanged, this, &PartManageWidget::updateLevelUpButton);
+    connect(m_componentPreviewGridWidget, &ComponentPreviewGridWidget::unselectAllOnCanvas, this, &PartManageWidget::unselectAllOnCanvas);
+    connect(m_componentPreviewGridWidget, &ComponentPreviewGridWidget::selectPartOnCanvas, this, &PartManageWidget::selectPartOnCanvas);
 
     connect(m_levelUpButton, &QPushButton::clicked, [this]() {
         const auto &parent = m_document->findComponentParent(this->m_componentPreviewGridWidget->componentListModel()->listingComponentId());
diff --git a/application/sources/theme.cc b/application/sources/theme.cc
index 06e1470a..faa4a5fa 100644
--- a/application/sources/theme.cc
+++ b/application/sources/theme.cc
@@ -55,7 +55,7 @@ void Theme::initialize()
     Theme::toolIconSize = (int)(Theme::toolIconFontSize * 1.5);
     Theme::miniIconFontSize = (int)(Theme::toolIconFontSize * 0.85);
     Theme::miniIconSize = (int)(Theme::miniIconFontSize * 1.67);
-    Theme::partPreviewImageSize = (Theme::miniIconSize * 2);
+    Theme::partPreviewImageSize = (Theme::miniIconSize * 2.3);
     Theme::sidebarPreferredWidth = Theme::partPreviewImageSize * 4.5;
     Theme::materialPreviewImageSize = Theme::sidebarPreferredWidth * 0.4;
     Theme::previewIconBorderSize = std::max(1, Theme::partPreviewImageSize / 20);
diff --git a/dust3d/base/debug.h b/dust3d/base/debug.h
index a071bbe2..e53a4d32 100644
--- a/dust3d/base/debug.h
+++ b/dust3d/base/debug.h
@@ -75,7 +75,7 @@ private:
 #define DEBUG_STRINGIZE1(x) #x
 #define DEBUG_STRINGIZE2(x) DEBUG_STRINGIZE1(x)
 
-#define dust3dDebug dust3d::Debug() << __FILE__ "(" DEBUG_STRINGIZE2(__LINE__) "):"
+#define dust3dDebug dust3d::Debug() << __FILE__ "(" DEBUG_STRINGIZE2(__LINE__) ")#" << __func__ << ":"
 
 #endif
 
diff --git a/dust3d/mesh/rope_mesh.cc b/dust3d/mesh/rope_mesh.cc
index 7d2a20ab..6c2f7e9e 100644
--- a/dust3d/mesh/rope_mesh.cc
+++ b/dust3d/mesh/rope_mesh.cc
@@ -121,14 +121,19 @@ Vector3 RopeMesh::calculateTubeBaseNormal(const std::vector<Vector3> &vertices)
 
 void RopeMesh::addRope(const std::vector<Vector3> &positions, bool isCircle)
 {
+    if (positions.size() < 2) {
+        dust3dDebug << "Expected at least 2 nodes, current:" << positions.size();
+        return;
+    }
     Vector3 baseNormal = isCircle ? calculateCircleBaseNormal(positions) : calculateTubeBaseNormal(positions);
     std::vector<std::vector<size_t>> circles;
     circles.reserve(positions.size());
-    for (size_t j = isCircle ? 0 : 1; j < positions.size(); ++j) {
-        size_t i = (j + positions.size() - 1) % positions.size();
+    Vector3 forwardDirection = (positions[1] - positions[0]).normalized();
+    for (size_t i = isCircle ? 0 : 1; i < positions.size(); ++i) {
+        size_t j = (i + 1) % positions.size();
         auto circlePositions = calculateCircleVertices(m_buildParameters.defaultRadius, 
             m_buildParameters.sectionSegments, 
-            (positions[j] - positions[i]).normalized(), 
+            forwardDirection, 
             baseNormal,
             positions[i]);
         std::vector<size_t> indices(circlePositions.size());
@@ -137,6 +142,7 @@ void RopeMesh::addRope(const std::vector<Vector3> &positions, bool isCircle)
             m_resultVertices.push_back(circlePositions[k]);
         }
         circles.emplace_back(indices);
+        forwardDirection = (positions[j] - positions[i]).normalized();
     }
     for (size_t j = isCircle ? 0 : 1; j < circles.size(); ++j) {
         size_t i = (j + circles.size() - 1) % circles.size();
diff --git a/dust3d/mesh/rope_mesh.h b/dust3d/mesh/rope_mesh.h
index c2ed7ef3..bc038e53 100644
--- a/dust3d/mesh/rope_mesh.h
+++ b/dust3d/mesh/rope_mesh.h
@@ -34,8 +34,8 @@ class RopeMesh
 public:
     struct BuildParameters
     {
-        double defaultRadius = 0.01;
-        size_t sectionSegments = 5;
+        double defaultRadius = 0.008;
+        size_t sectionSegments = 8;
     };
 
     RopeMesh(const BuildParameters &parameters);