Ditto here. Early on I managed to get a second hand Orion Accufocus. It was designed for an R&P, but I found a way to fit it to my GSO Crayford. I now have a GSO 10:1 Crayford on my scope, but have still fitted the Accufocus. Had to make the connection more rigid, since the torque required to turn the main focus axis of a 10:1 is more than a regular GSO Crayford.
Though the 10:1 is sufficiently fine focus control, my clumsy hands always wobble the scope to much - so I prefer no-touch electric focussing.
Here is the relevant thread:-
http://www.iceinspace.com.au/forum/s...ad.php?t=10782