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For most young folk get it as close as possible and leave it at that but even better as I did with a friend, I purchased a cheap collimator for her sons 130 Newt and taught him how to use it. When I use my 8" GSO f5 Newt I set it up before dark and always double check and tweak it (if necessary) before I start trying to image, it's not a hard procedure.
I think the majority of smaller units like the later 127 Newts from Celestron aren't that adjustable but I may be very wrong on that count.
Just the cheap washer type collimator and a good torch does the trick with what I play with, no great degree of accuracy but the primary is spotted and my son has great eyesight (me not so much so I always get him to help).
One day I have to do my RC8 and from what I've read that thought has me very scared, I'd just rather not use it at the moment.
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