Motorising the crayford can be done easily with the belt idea, as I've done with my Moonlite CR2.
RAJAH235 (Laurie - where is Laurie btw?) made the unit for me and my dad and I made a bracket to fit it to the scope. I use an O-ring to drive the fine focus knob.
Here's the thread when it was first done, 18 months ago! Wow how time flies.
http://www.iceinspace.com.au/forum/s...=motorised+CR2