@Ian *******
also, if your 90 days is over in 3 weeks, I'd suggest you get along to immigration soon. I took the tm7,copy of passport, and entry date stamp page, passport photo, bank statement to prove I still had funds, my child's thai birth certificate ( born abroad), proof of residency (tm30) copy of TDAC, copy of visa, copy of house book (tabian baan), also needed my wife there for some reason for her to provide her ID card, also needed I think it's the KOR 2 from amphur to verify that we were in fact still married.
If you.know what you need, and have all the supporting documents, it was a very easy process that took us a little over 30 minutes.