I have a Steel City table saw with granite top. The mitre slot narrowed at the back end. Scoured the internet for solutions and most said that it was better to return the unit for a new one or take the thing apart (about 6 hours work). I live 2 hours away from the nearest dealer, so, not to declare defeat, I decided to fix it myself. Loosened the nut that obviously holds the granite from moving and stuck 2 mdf boards into the mitre slot. Stuck a large screwdriver in between and gently nudged the 2 slabs apart. Tried the mitre guage again. It worked! For anybody who may be having the same problem.