Fisher's right, hot wire cutting is mainly to keep the foam dust down and requires much less sanding to finish it off. I normaly use my large wing bow to rough cut a piece off the 4x8' sheet, then cut it on the table cutter more precisely. Regardless, I still have to sand a bit. Where a hot wire cutter really shines is for cutting the wing airfoils. You could sand one out but talk about time intensive. I'd go mad. Which reminds me, another quick and dirty way to make a wing airfoil and strengthen it at the same time to boot. Simply take some flat foam (any type will do) and fold it over a balsa spar which will be at the leading edge of the wing. The balsa creates a nice curve airfoil and does double duty but strenghtening the thing. A friend showed me this though he used it on a coruplast wing (talk about something that can take some punishment).