I purchased an R270 belt sander about 2 months ago. Within 48 hours it had stopped working. No response at all when teh trigger was depressed. I had used about 6 belts sanding some random width pine floors. I took it back to home Depot and had it replaced. Now my second sander has done the same thing. Has anyone else had similar problems with this model of sander? I like teh toll but if it isn't relaible what good is it?