I saw this on the instructables site. http://www.instructables.com/id/Bicycle-Frame-Polar-Tracker/

Thought it was an interesting idea for maybe tracking the sun. But maybe the more mechanically inclined might be able to build on the idea and modify it a bit more for hamsat use. I have seen a lot of scrap bikes these days that look like they might yield a wealth of cheap bearings, AZ-EL mount, Chains, sprockets, ect.

Mike

N6IMF