Mmmmmmmmm
, So what us dobber's need are worm drives, and flexible drive cables, on our primary adjusting screws so that we can go to a star test at any time, and tweak the adjustment while concurrently watching the ring patterns and their movements????? Beats the hell out of the current up and down, back and forth activity, and wondering which one, or way, you tweaked last time. Could be servo-controlled too?
I'll keep a record of this in case some-one tries to beat me to the patent's office!
Graeme