I have a Celestron NexStar 90SLT Maksutov-Cassegrain telescope. It came with a flimsy plastic red dot finder scope. I discarded it and use the metal base to mount a StarSense Auto Align module. Well, now I think I might like to mount a finder scope on it as well. There are no other pre-drilled holes on the OTA. Any ideas for how I could mount a finder scope? Is it safe to drill and tap thread some more holes or am I likely to hit something important inside? And furthermore, how critical would the alignment of the holes be? Could I make up for any error in alignment with the adjustment of the finder scope if I just eyeballed the holes? Do they make a double headed mount shoe adapter that would give me enough room to mount the finder scope? I have seen a similar adapter to what I am describing used on rifles to mount a red dot and a scope together. Any ideas are appreciated.
Thanks in advance beehive mind.
Edited by carbean, 22 October 2019 - 04:02 AM.