I have a CT-9R that I am working on. It has an odd problem with the transport. After replacing the belt I tested it with a tape and found that the pinch rollers don't pinch. The head assembly does rise and stay in place, but not quite far enough to let the pinch rollers contact the capstans. The upper limit stop is very positive and metallic. No plastic. I can hear that much. Looking down inside the mechanism with the reel motors off, I see a brass pin that engages a slot in the back plate when I push the head assembly up. I don't think it goes any higher than it is going unless that pin is supposed to retract, and there appears to be no way for that to happen. It appears to be coming out of the head assembly and it I can see probably 12 mm of it. It's a pretty hefty pin and there does not seem to be anywhere for it to retract to. It looks like the head assembly is just hitting the designed upper limit. I know some one has been in there from the misplaced screws. What I am wondering is if the pinch rollers were replaced with ones too small for the deck. Or maybe they shrunk. Normal wear is not a possibility because there is a gap between the capstans and the rollers (both sides) and wear would have stopped with them just in contact. Does anyone know what size the pinch rollers are supposed to be? Mine measure about 17.9 mm. Any other ideas? I am stumped at the moment. Pin with heads down: Pin with heads up: ps: yeah, the endoscope has the wrong date. Those were taken today, 4/4/2018.