"Harry Bloomfield"; "Esq." wrote in message
...
on 22/05/2021, alan_m supposed :
In my experience, if the screw comes out once it will do it again unless
you put a bit of superglue or nail varnish on it to stop the screw
turning.

Yep, did that - I used superglue.

You have to be careful with that, I ****ed a pair of
sunnys with a fingerprint of superglue on one lens.