My only experience was disastrous! Of course, I was new at scroll sawing, using an old craftsman scroll saw and their blades. I've heard that FD spirals are usable. It would take a whole different mind set - every time the blade touches anything it cuts. You'd have to learn to not turn corners but change the direction of the wood only, being sure you are in scrap wood or space when you do need/want to turn the piece. I'll probably try again when I get different blades.