I just used a bottle of rat shack cleaning soluion to keep the arm from sliding back to it's holster. Then I bought an inexpensive digital scale at the local "head" shop to measure my tracking force, and turned the tracking force dial to "3". I found that the trackiing force dial on my RB300 was not even close to accurate. The digital scale only goes to the first decimal(tenths?), but seems more accurate than measuring overhang and then setting the force by the dial! i think the scale set me back $50.
