WPF Elliptical Layout Control II - 3D Carousel anyone?

A follow up post to my elliptical layout control which takes it in to the third dimension. The result is a FrameworkElement derived control which takes a collection of UIElements as its content and internally wraps them in Viewport2DVisual3D objects, displaying them in a Viewport3DVisual. Using the elliptical layout code with a few enhancements we essentially have a 3D carousel control where the parameters used to define the imaginary layout ellipse are fully configurable. Source code and a demonstration app are included and free to use for whatever.