Hi I know it sounds strange. I have lived here for 14 years always on Multiple non b work permits etc, last visa was multiple non o as it suited me because although I live here I travel often for work

Now I am sort of semi retired so I have year retirement visa extension whatever its called, and to cover my frequent business trips I have multi reentry permit

Question is

Now I normally used to leave every so often to do visa run at Sadao and meet up with a old flame in Hatyai

On the set above can I still nip to Sadao cross to Malaysia and reenter straight away, get another 90 days........... and an afternoon /evening of illicit pleasure

thanks for any info

You can leave whenever you want and upon your return you will get stamped in up until your 12 month extension ends.

If you have an extension of stay and a re-entry permit you get a permit to stay equal to when you extension ends. It does not matter whether you enter by air or land.

Thanks for the confirmation! just checking as visa and immigration are a minefield nowadays

from OP:

Now I am sort of semi retired so I have year retirement visa extension whatever its called, and to cover my frequent business trips I have multi reentry permit

Question is

Now I normally used to leave every so often to do visa run at Sadao and meet up with a old flame in Hatyai

On the set above can I still nip to Sadao cross to Malaysia and reenter straight away, get another 90 days........... and an afternoon /evening of illicit pleasure

If you have a retirement extension there is no need to "get another 90 days." A retirement extension is good for one year.

Are you still working at all in Thailand? If so you should have a work permit, and it's very rare that one is given on a retirement extension these days. So between that and your wanting to get an additional 90 days, I'm not entirely sure that you have a retirement extension.