Your basic rig looks quite similar to mine. But I think our approaches may be distinctly different based on some of your comments. The record player motor is a great idea. A 78 speed would be ideal for my set up, even at a 3:1 gear ratio. Can it be run in reverse ? Also, how much weight are you using for the tensioning ?
We are obviously in a very small minority among the folks who posting on this subject. Even at that, I've picked up some really good ideas from those who use Kathy Scott's method, that can be incorporated into the method I learned. Whatever else you care to share about your approach would be appreciated - either on this thread, a new one, or by pm.
The fish are always right.