Nice work. Can you re-render this without textures (just plain colours)? The repeating textures make it a little difficult to see the form of your model.
If you guys ever have an itch to get back to Blender, check out gryllus.net. There is an excellent set of video tutorials done by a Tufts University professor.
If nothing else, they could provide food for thought on future Sketchup ruby scripts.
mitcorb