OK, so found these - I bought 5 in though freight killed me - seller wasn't kind in combining freight costs...
though fits the bill for movement to allow non-centralised beam to be centred at will.
Happy to flick off at cost - $50 plus post... like I say, freight was the wringer...
Pictures below - Sytong illuminator just for demo purposes to show 25mm ( 1 inch tube fitment)
Thoughts?
Bookmarks