I spent a lot of time creating this droid and upon getting close to finishing it, my poor G4 400 tower with 2GB of ram and the Radeon 8500 in it became terribly bogged down. It takes forever just to open the file in either the modeler or animator. I think a G5 is called for if I'm ever to create complex models such as this again.
I haven't finished the dome or the back. I created this shortly after purchasing 3D Toolkit and going through the handful of beginner's tutorials that show how to use the basic tools. It's mostly just a lot of slicing and subtracting using other shapes as tools.