Went to Korat immigration office to receive my 90 day stamp for my retirement visa. All went well, although it did take up almost two pages of my passport.
Next step is the one year visa, which I was told I did not have to wait the full 90 days for, and that I could come back and receive it within 45 days of the end of the 90 day period.
Was good to know. I can get it and be out by Christmas.