@Michael *******
during the first year of a 1-year stay permit out of a Non-Imm-O/A visa, you only need to do your 90-days reports on Immigration. However when the day of the expiry of the visa validity (do not confuse the end-date of the visa validity with the date your stay permit is valid until!) is nearing, you need to do a border run in order to get stamped in for another 365-days period. You must secure a new one-year health insurance, get their F.I.C. statement which you need to show at the border when re-entering, as you will only get stamped in for as long as the health insurance is valid when you do a border bounce. During the "second year" (after the expiry of the visa validity) you do not have a multi re-entry permit any more, so if you wish to exit Thailand and return, you need to buy a single re-entry permit to keep your most recent stamped stay permit alive