Randy, I have an ex 21 and never had a problem with the speed.first of all make sure your blade is straight.put a square on your table and next to the blade and see if it's straight. I use a 3/0 ur on most everything I cut with no problem.sometimes I also use a #5/0. I get all my blades from Mike workshop.also don push the wood into the blade. That will make the blade wander. The