I don't have much luck with attempts to join that forum.
They have lots of professional 'film handling' types, modestly self-described as 'god' and similar. The site is invaluable for research on technical stuff, including questions made over the years by previous owners of the very same projector I want advice on, which is very enlightening. But no help as I want to ask a new question.
It may be that I joined years back under a different email so this may be the reason. I got a password but the forum admin never approve so I cannot log in and submit my enquirey.
I have put a question elsewhere on this forum in the 35mm section so knowledgeable Reel Magic members may help?