An update - we went to Rayong Immigration last Friday and despite my telling the 'cherished one' that we should do the renewal of the Retirement visa first , she charged straight up to the 90 days window , she talked with the girl , I was handed a TM7 and a TM47 to complete , which I did whilst she yakked some more , I handed back the completed form - the girl checked them,asked for some money , 1900 bt , then asked us to sit down for a few minutes . shortly she returned with my passport duly stamped and we were on our way - time taken 20 minutes .