I've had a Systemdek IIX for the last 8 years or so and it has served me well. I recently acquired a 45 record and was trying to figure out how to adjust the belt for the 45 speed. I read that you can manually do this by placing the belt on a different (lower) groove on the drive hub once you remove the glass platter, but my drive hub only has one groove. Do I need to get a new drive hub spindle or am I missing something? I acquired the turntable from my Uncle some years ago, so not sure of the original configuration.