Hugh
I've just ordered the Optec FocusLynx system.
http://www.optecinc.com/astronomy/ca...lynx/index.htm
http://www.optecinc.com/astronomy/ca...lynx/19690.htm
Capable of dual motor control (optional).
I also got the wifi board (optional).
Heaps of other upgrades available.
Can even controll over Android app: "FocusLynx Web Controller"
https://play.google.com/store/apps/d...ptec.focuslynx
Can drive the major focus motors - Starlight, Robofocus etc. Very flexible.