More stuff from my observatory clean up....
I have two fine motion altitude-azimuth adjusters.
One is made by Vixen (
read about them here)
The other (image 2) was marketed by Astro-Physics as a guide-scope adjuster.
Both use 1/4-20 tripod photo threads. Both have a range of about +/- 10 degrees.
Asking $40 for the Vixen (as new) and $30 for the AP (very good nick) ...
Pick up Sydney's south or will post anywhere in Oz for $15.00