Index: src/Plugins/Wti/Wti.Plugin/WtiGuiPlugin.cs
===================================================================
diff -u -rb16cc39381e4275844ad330e0bc56ede52aa5b88 -r7dbdaa8f71d62ee684997df42d666716bc17fce8
--- src/Plugins/Wti/Wti.Plugin/WtiGuiPlugin.cs	(.../WtiGuiPlugin.cs)	(revision b16cc39381e4275844ad330e0bc56ede52aa5b88)
+++ src/Plugins/Wti/Wti.Plugin/WtiGuiPlugin.cs	(.../WtiGuiPlugin.cs)	(revision 7dbdaa8f71d62ee684997df42d666716bc17fce8)
@@ -75,6 +75,7 @@
             yield return new WtiProjectNodePresenter();
             yield return new PipingDataNodePresenter();
             yield return new PipingFailureMechanismNodePresenter();
+            yield return new PipingSurfaceLineCollectionNodePresenter();
             yield return new PipingOutputNodePresenter();
         }
     }