Hey, guys. I have a problem. I own one of (All Hail) Bob Gollihur's inexpensive bass wheels (not the Gaines) and since I've had it, I've never been able to successfully use it. When the wheel is in the shaft and the retaining screw is tightened as much as possible, the pin still rotates. I'm sure that I have the right diameter pin. One of the sides of the pin is milled to form a flat, and I assume that when the screw is tightened, it shouldn't move. Can anyone tell me what's going on? Thanks!