Review on Sander Grinder Polishing Plastic Aluminium by Jason Unruh

Very large air volume required for operation. My compressor runs at 5cc. feet per minute at 90psi and won't be able to keep up with that. Unless you have a very large tank, be prepared to wait between short uses. The front pulley bearing is too thin and causes the wheel to rub against the frame. 2 small washers between the bearing and the frame fixed it.