Hi,
I have just built and fitted a really cheap telescope goto drive as in here:
http://www.stellarjourney.com/index....uipment_onstep
to my Losmandy G11 that previously had a Gemini 1 fitted. I was looking at options as I had a bent shaft in one of my G1 motors. These motors are not cheap. I was able to build a whole drive system including buying new 400 step steppers for about 2/3 the cost of 1 Gemini motor.
The new drive slews faster and quieter than the servos. The main benefit is that the steppers can connect directly to the worm on the G11. Last night I was able to do a quick PE test between the clouds and came up with a figure of +2.4, -2.5 arc secs (the mount has an Ovision worm) however the best part is that it none of the higher frequency hash associated with gearboxes. It was simply the smoothest PE curve I've seen outside of the premium mounts.
Might help someone else looking for a cheap drive.....
cheers
Gary