If you wanted to you could use a bigger servo mottro like the pittman. The yahoo groups "roboscope" has details (in there file section) on how to modify the DS circuit to work with Pittman Servo motors.
DS motor Mod for Non dS motors.
http://groups.yahoo.com/group/RoboSc...n-DS%20Motors/
http://ph.groups.yahoo.com/group/Rob...os/browse/d04d
I have given doing this much consideration. However my lack of carpentary skills limits is holding me back. If i could but find a custom rocker base with appropriate bearings i would consider it. As you say Mike with appropriate bearings you can even use the DS motors.
This mount is an idea if anyone here is game to build it.. If you are then let me know maybe you can build two
http://www.livingstonetelescopes.co....GE-2%20COM.htm
Another Idea is this one.
http://www.saunalahti.fi/~jsobser/ekvatjalusta.htm
I belive with Either as and appropriate bearings even the DS motors could be made to perform. If you check out the Roboscop group you will see what is possible.
Regards.