What are the visa rules for re-entering Thailand with a METV and TR-60 before the expiration dates?

I'll pay the 1900 to not have to read this again !

@Rick *****

When you enter Thailand on May 29, you will receive a new 60-days stay permit which will carry you until July 28. You should exit Thailand until this date.

So, since the visa validity expires on July 29, you need to do a border bounce BEFORE July 28. If you bounce on July 28, you will receive a last 60-days stay permit until September 27. You COULD stay outside Thailand for one night, and re-enter on July 29, that will carry you to September 28

Then it's up to the discretion of the Immigration if they will grant you a 30-days extension on top of that

You will get stamped in for 60 days on May 29 which if I calculate correctly takes you to July 27. If you leave on the 27th and return on or before the 29th you will again get stamped in for 60 days which you can extend by 30 days at immigration then you are done

You’ll get 60 days upon each entry until the last day of your visa and all entries can be extended with additional 30 days. In total you can stay almost nine months on a six months METV.

And you don’t get anything tacked on your previous stay. Your previous 60 days TV is cancelled and a zero when you’re stamped out. You re-enter on a fresh 60 days stamp.