I saw a thread that was several years old regarding problems with the casters on Powermatic table saws. I have a 2000B Powermatic and the urethane casters have completely disintegrated. PM wants $40/caster on their website so $160 + shipping. The saw is extremely heavy and I see no way to access the built in carriage except to tilt the saw on its edge somehow. Has anyone replaced their casters with another less expensive option and how did you go about removing and replacing?