Visited a local WW artisan today and he's got a Rockwell Unisaw he's looking to sell for a decent price. Nice shape w/a brand new 110v motor. Several questions: Anybody have one of these and, if so, how useful are they? And then, in the quick searching I have done, I can't seem to find replacement blades for it. The ones on it right now are sharp, but I'd venture to say that, if I use it a fair amount, there's a good chance they'll need replacing at some point. Any sources???? Appreciate any info you guys have to offer.