I'm trying to think what I actually use my Dremel for in kit building. I use a wire wheel to clean up solder joints. I use a sanding drum for shaping and smoothing cowl openings, and I use a reenforced cut-off wheel for cutting piano wire. That's about it. A hacksaw, a chainsaw file, a rat-tailed file and a wire brush could replace the Dremel for me.

For most kits I'd rather have a good razor saw and miter box, a razor plane, a set of metric and standard Allen wrenches and various size screwdrivers (00, 0, 1 & 2 Phillips and long standard screwdrivers), and an assortment of sanding blocks.