I'm having a problem with the 2-pt. mounts on my Gamma 6004. I purchased it last year and have strung about 50-racquets with no issues at all. I was doing one the other day, about halfway thru the racquet slipped in the 2-pt mount. I re-tightened it but it kept wanting to come loose. I cleaned the rubber pads on the bottom of the hold down clamps but they didn't seem dirty. I had the same problem doing a racquet today. I can't see anything wrong. The picture below isn't mine but it's the identical machine. I have the white pads that go on the inside of the frame raised as high as they can go without hitting the grommets. When I ratchet the hold-down clamps down they feel secure. It's only after I get part way thru the crosses that the racquet slips. Has anyone had this happen?