Hi everyone Barry Davis here. I'm new to this site. I recently rebuilt my old Unisaw with a new arbor, pully, belts and bearings. Best I can tell this is a late 40's early 50's saw. I have just discovered I left the wave washer off of the arbor. My question do I need to dissemble the arbor again and add the wave washer or is it ok to run the saw without the washer? The saw runs fine now. I can stand a nickel on edge and turn the saw on and the nickle will just stand there. I apologize if this is not the correct place to ask this question.