I use the SW electronic motor on my TS102.
A small toothed pulley fitted to the motor shaft and the toothed belt just runs on the 10:1 knob.
I used the SW mounting plates with a 6mm spacer.
Photos available if needed.
(I can control it from the laptop via the Shoestring FCUSB...majic!)
http://www.store.shoestringastronomy.com/index.htm