This is derived from a model I found on Google's 3D Warehouse http://sketchup.google.com/3dwarehouse/details?mid=e877ba46c48af9c1e1c455175eaffee1I plan to try to make this to scale in a multi-part design. I just need to decide on how to split it and how the parts will assemble.This version is just under 5 inches long (115 mm).This requires support material due to the collars. I set the raft on mine for only the base layer and the support acted as interface layers.