I had plans to do just this, but have decided to use the GEM instead. Plus I have splurged on another astro toy.
Dob Driver 2 unit, from Tech 2000. Comes with Hand Controller, alt & Az motors, software, instructions, and the Roboscope option. For full description check the site,
http://homepages.accnorwalk.com/tddi...000/page3.html
New these are US$749, plus the Roboscope option at US$99.
This is used, and is priced at AU$630 posted.
You will need some woodworking skills, but the ability to track an object using a dob is uncanny.
E mail me off group please at
g.beal@clear.net.nz
Thanks,
Gary