Got to agree on the Dremel. When I first got back into modeling seriously around 2000, I shot out and got an electric Dremel "MultiPro" deluxe set with the foot and a half long gray box with ALL the attachments.
The first body I used it on was a JoHan Petty Superbird and as Mark said, it got away from me and I MANGLED that baby! Decided pretty quick that it had more power than I had finesse and went out and got the battery-operated blue "MiniMite" model. It is considerably more manageable but will still get away from you if you're not careful. As a result I use the battery model to rough out some things, but much prefer the control of the sanding sticks and scalpels. The electric model is great for some around the house jobs but hasn't touched a model since that first one.
John