You have to learn to slow down and let the blade do the cutting. I cut 3/4 puzzles mostly with #3 olson mach speed, prefer the way they turn. I have cut with #1 FDUR, tight fitting, but you have to go slow and wait for the blade to catch up when doing the tight turns on the keys. The easiest way I have found is to pause and let the blade catch up then go slow through the tight turns. Saw is ex 21 and the speed is always wide open.
This works for me try it and find what works for you.