For modeling projects, the only power tools I tend to use are as follows: Dremel tool(with various attachments), belt/disc sander, cordless drill(with good bits), scroll saw(especially if you want to scratch build your own parts), and the GP hinge slotting tool. Lots of Xacto and razor blades are invaluable. My local hardware store sells razor blades in packs of 100 for $5 something. I also made my own sanding blocks from wood and keep various grades of sandpaper on them so they're readily available when needed. Give me all these goodies, a nice kit or set of plans, some spare time, and I'm a happy camper.