So I picked up this old PM66, from the late 70's. The guy used it to make picture frames and he ran some pretty heavy tools on it, when I got it the blade would wobble. I replaced the bearings on the arbor and it cuts much smoother now, but when I shut the machine off, the blade runs smooth for a bit but then at a point when it slows down enough it suddenly vibrates a ton and makes a bunch of racket. I have a whole new arbor assembly for it, but before I install it, is there something else I should be concerned about with this saw?