Thrifty, do you think it is all about fun and getting his own way or do you think he could be struggling in some way? I know that he is high functioning, however he must find some things difficult? especially if you have always stuck to boundaries and followed through and things are not improving.
Take bedtimes for example, this is when ds does most of his worrying, then just cant sleep. Luckily ds can tell me that he is worrying and I have put some things in place for him, but if he couldn't express his worries (he couldn't previously), he would just seem naughty, up and down the stairs, in and out of bed, hanging off the bed etc, etc.
Ds is also very controlling and has very low self esteem, where he feels so out of control with other aspects of his life.
New school is going good, only been a few days, but 100% improvement. We are still having some refusal to do things, but pretty minimal in comparison to how it used to be.
A few months ago ds was refusing to engage with professionals, teachers, refusing assessments etc. Yesterday he came out of school with a sticker for doing good math work and was very proud of it, a few months ago, he would just sit in silence for an hour, refusing to engage and couldn't care less about a sticker! And he has a SALT assessment this morning.
He is starting to be motivated again.