Vin666,
I believe you have the same scope as me. GS 12" Deluxe Dobber.
The one with the Crayford focuser and cooling fan.
I have the correct Nylock nut (nylon locking insert) and I also use a spring washer which should not be necessary and yet the nut still comes loose turning the Azimuth anti-clockwise. You are not alone.
I also have to use both tension springs to stop any movement from the slightest touch!
I think these must be GS 12" bugs, but I am working on solutions. I will let you know if I find any easy fixes.
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