Hi, I need some info about extending the tourist TR visa at Chaengwattana. Is it possible to book a time slot online or do you need to queue (I've heard it takes ages)? Also what's the timing for obtaining the extension? Do they do it on the same day you do the request or have to go back and pick it up a different day? I've got 2 weeks left on the visa now, not sure when it's the best time to go (does the extension start from the last day on the visa or from the day we physically go to do the extension application?) Thank you very much!