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Hi Stephen,
very impressive build and good to see a different approach with the focuser.
that dual stepper solution is ingenious, but how did you manage to fix the nut in the timing pulley for the threaded rod, and does the threaded rod exhibit any backlash especially when you've focused on one side of the meridian and you flip over, does the focus change at all?
what does it weigh with mirrors and camera?
Cheers
Alistair
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