I nabbed my roo and wrapped him in a towel to trim his fro without stabbing him in the eyes. It's a big help.
I'd say roos are much more capable and helpful by 4 months- he's just a tween boy right now, so can't be of much help. I tend to think of their weeks as 'years' of growth. If he's 11...he's 11! When he's 14 he'll be randy and awkward, jumping everything that moves and have ZERO social grace. Wait until he's 16! You'll have a good worker on your hands, and 18, he'll start really being a bit of a man.