@Tom *********
I understand what you're asking, unfortunately the group doesn't have or provide that information, Robert told you that.. :/
You need to slog on out to Chaengwattana and get the hand out for the requirements to get a yearly extension based on marriage to a thai,
THEN you need to compile them, get the bank book updated, get the bank letter, the photos, the map etc, AND cancel your work permit, take your termination paperwork with you and go cancel the Extension based on employment and immediately apply for a yearly extension based on marriage to a thai