Ken & all, Not much of a pic. but the 3 collimation screws have very heavy springs fitted, (1" long x 3/4" diam. x 1/8" gauge approx).
Not quite valve springs but close.
As I said before, *bottom them out*, the undo about 1 turn each & collimate from there. Then NIP the lock screws.
I only have the 3 to adj. so this is how I do mine.(without the nip of course).

L.