[Galah (Patrick)]

I am using a Stellarview F80 as a finder. When fitted with the reticle illuminator, at certain positions the leveraged weight of the illuminator overcomes friction in the threads and causes the focuser to rotate under gravity.
I believe that a 'heavier" lubricant might overcome this problem.
Has anyone had similar experiences? What fixes were attempted and what were the results? Suggestions? Lubricant spec?

Regards,

Patrick.