Ok so we just got a used Griggio SC3200b slider and are having some issues with the tilt mechanism. The blade will not go to 90 degrees. Once you get about 1/2 way or so up from the 45 degree position the hand wheel or worm gear slips and the blade carriage won’t go any further towards 90. I can pick up on the blade carriage while turning the hand wheel and get it there but if I let go it goes right back to where it was. Again, it adjust for a few turns before it slips and won’t go any higher even though the hand wheel is still being turned. Right now I have a bottle jack and a 2x4 holding the blade carriage up where the blade is dead on square. Do you guys know if there is any adjustment on these saws for getting the worm gear and shaft to mesh better? Could there be a set screw loose on the shaft? Any ideas or suggestions on what I can do to fix it? These sliders I believe were sold under many different names but the design is always the same. Any help you guys could give me would be much appreciated.