Hi Carl
I have an Orion Electronic Focuser fitted to my scope and I have fitted the same motorised Focuser to all my scopes (Dobs, Refractors and SN).
It is an Orion Accufocus with a simple hand controller
HERE
HERE is a thread I made about one type of adaptor I made which fits most Crayford style focusers.
and one style of bracket I made to fit it onto an ED80
HERE
which also worked on my 120mm refractor.
I have made different brackets for other scopes I have used it on.
It is currently on a Meade SN10 10" Schmidt-Newtonian and the bracket I made slips under the tube ring so it doesn't have to screw to anything
For the adaptor to fit the 10:1 side I used the original flexi-drive they supply and I shoved a rubbery plastic tube up inside it made from the insulation from electrical wire (with the wire removed).
I took the unit and hand controller to a local Electronics shop to show them what plugs it uses and they crimped the right connectors on the ends of a 25 metre telephone extension cable for me
In the 6 years I have had it I have only changed the 9v battery once and I use it a LOT!