I purchased a Meade SCT model 2120 around 1983.
It has not been used much.
I can't recall if this was always the case but I would suspect that I would have noticed this when I first purchased the scope.
I did use it a lot in the first years.
The inside threads on the eye piece holder used to connect to the back plate of the scope are just a bit too large
During a recent star party I realized the holder was hanging on the thread not engaging as threads should and never tightening
Some duct tape wrapped around the external threads of the back plate saved the night
I also noticed that the inner flange was too small to bottom out on the back plate so even it the threads did engage the inner barrel of the holder would never be tight.
I purchased a new holder and it works like a charm but I am baffled as how this can be. I am not looking for a refund the part was very reasonably priced I just cant figure out how this can be. I made a padded case for my lens' and various items and the holder has a spot.
I thought that I may have mixed up the holder with a camera adapter but can't find any thing else that would fit the foam cut out as does the old or new holder. And the old holder will not attach to my old 35mm of a similar vintage.
Not a very astronomical topic but if anyone else ran into the issue I would love to hear about it.