so far no vibrations, I was surprised how quite it runs. i will fire it up later and post a video. it is super sold, i am sure that helps. the 1/2 shaft is drill rod, so the shaft is true. and the framing is double stacked 3/4" ply. i bisketed the first ply then put the second ply on so the joints would be backed by solid wood. plan on adding a siccior jack elevator once i can sand some oak boards to thickness. the motor was a spare but it is a supper quite motor, i dug it out of a trash can several years ago, it had a bad toggle switch.