Howdy,
http://astroproservice.com/index.php...-standard-3-2/
I did use this system to modify my (damaged) CGEM-DX ... the servo-motor ha been busted... I did planed to use it with the Buyers Gear EQ mount I design.,,
So, the stepper-drive and EQMOD is great... was a bit of learning after the Celestron, but now it's great. Use PHD2 and works with CDC.
I'm still in Adelaide... pm if you want to see it
Ps: not sure if your Schafer has dual-axis drive or tangent arm?
Cheers,
Mick