Quick report from visa extension (TR Visa) at chaeng wattana last friday
1. I had to get a print of my E-Visa (60 days TR) which I did not have prepared beforehand. You can get it done a ground floor level, several copyshops, same if you don't have pictures.
2. Had an appointment at 16:00 and was out at 16:20 - quite surprised ;)
Good luck everyone.