Well, I'm 87 and I do my 90 online. Occasionally, it doesn't work, so my younger wife does it for me. For my annual extension, I simply go in with my wife and we do it ourselves. I prepare all the documents in advance and get a letter from K-Bank the day I apply. I do use a wheeled walker for long distances, but it is no problem at Chiang Wattana. Planning to return to the USA soon for about a year. That trip may be a challenge.