Hello gamma users and support: from the manual: Adjusting the Turntable Bushings There are two adjustment points on the machine base. One is located beneath the polystyrene base cover while the other is accessed from below the machine. I don't see "the other" adjustment point on the machine base. I only see the one pictured in the manual. no matter how I adjust the bushing using the hex wrench. It can't get to the level of smoothness I expect. always quite some friction. the more you tighten the bolt the more friction it has. I am not sure it is just a problem of my machine. Thanks. Jim.