I have a Delta Model 34-670 10" table saw. Usually works great BUT when I have been on it for a couple of hours the triangular knobs that hold the handwheels for adjusting blade angle and height vibrate off. Anybody have a solution to this? Lock-Tite or similar will not work as you have to be able to turn these to tighten or loosen the handwheel tension. The only solution I have come up with is to go buy a big bag of the knobs since they normally roll into a box of sawdust or under my workbench. Thanks.