I haven't explored the Yuen Method at all, but I know you can trust Chiron absolutely.
Personally, I'd suggest you offer your son
http://www.tapping.com
and suggest that he keep doing it until he is bored with it, and go back later.
Have him tap on any and everything he feels like. As he finds he can vanquish problems at will, he may out grow some others.
Dh has a tiny little throat-clearing when speaking with certain people on the telephone. He is 87 years old.
The throat-clearing is a leftover from age 6 when a schoolteacher tied his dominent hand (left) behind his back, to "teach" him that his right hand was 'supposed' to be dominant.
(Mother put an immediate stop to that by showing up at the school.)
But dh could't say his own name without stammering/stuttering...for four years.
I have heard the hesitation many times, but I didn't mention it. It is so tiny.
I would also suggest giving your son the oportunity to take baths/footbaths in Himalayan Mineral Salt Crystals...feed him wholistic food, even snacks, and the whole family do a few rounds of Humaworm/Hu-Mana-Tea, with a full 90 days in between each round.
Raising my own boy there are a number of things I didn't mention, and I am so glad I kept shut.
The incident I most remember was when he was bouncing a tennis ball off the wall of the house, when I was trying to follow a TV program on the inside.
I was going to holler, "Knock it off" when it dawned on me that, someday, I might wish that he was outside, bouncing a ball against the house I am really glad that I kept shut, at least, that one time.
Things afflict us, and eventually disappear. Trust yourselves is my best guess.
Fledgling