So glad to hear your son seems to be getting it.
I am a mother of a RAD. And I can't tell you how instrumental face to face meetings have been in MY recovery. I found out I'm just as sick as my AD and I needed a program to get my life back to the manageable state.
Please keep attending the meetings. There is so much to learn and the support from people who are going through the same thing just cannot be found anywhere other than with recovering folks.
Hugs and prayers that your son will keep on keeping on with the recovery,
Hangin' In