Thanks for the welcome
The controller cost $US350 which translated to about $A600 at the time. The two motors cost $US125 each, so all up for the controller/motor setup was about $A850. It integrates with the AN to give a complete goto/tracking system, although the controller can track on its own , and can also interface with a PC. Previously, I had a PC based stepper system running Mel Bartels software which I used for a few years. The servo system is much more reliable and usable. No waiting for PC's to boot, better slew speeds etc, although the $$$ are more.
The only real drawback compared with say an eq platform, is field rotation if attempting imaging of any extended exposure. Other than that, it is very easy to set up and align and for purely visual use is hard to beat. Am in the process of building a platform to give me the best of both worlds.
Regards,
David.