I have a Bman GG1 that operates poorly (two others are excellent). The rear truck is very loose in the frame, it can move longitudinally almost 1/4". The front truck does not do this nor do the trucks on the other two GG1's. The result is that the torque in the mechanism moves the truck at start up to a point where it shorts out occasionally, otherwise it is as smooth and quiet as the others. I have attempted to disassemble it to see the problem (I suspect that there is a plastic pin near the gear tower that restricts the truck movement, which has somehow been sheared off). I cannot figure out how to get to it. Has anyone taken one of these apart and can tell me how to get the gear tower out or at least expose it well enough to diagnose the problem?
