Occasionally, while running, the saw will make a cracking sound. And then on shutdown, it makes the same sound while decelerating. The small bearing on the arbor shaft seems a bit loose, but I'm not sure if it's my imagination. I replaced the armature bearings; so based on this very short description, do you think it is gear out of alignment because of bad bearing? They both rotate smoothly and make no sounds while in my hands, but no way to test at speed. I'm afraid to put new bearings in and then have to take it back apart to find the gears need replacing or whatever. Thank you