So I've had my 12" sliding compound saw for just under a year now. And I have two questions. Can the electric brake be replaced on it? Mine seems to have sputtered out. Also. I'm getting little black chunks falling out from the spring that raises the motor and blade back up after the cut. It looks like the spring has two plastic bushings or washers on either side of it on the inside. They both appear to be rotting away? Can these be replaced?