Actually, I recently got a Dremel tool and found it really useful. It takes a little getting used to, but it can cut, sand and drill all in one. And, it works on a whole range of material, from wood to plastic to stainless steel (I think). I've only tried it on HDPE and plywood so far, but it cut those really well. It's not terribly accurate for straight lines and stuff though, although that may be because I lack the right attachment part, or something like that.