Went to Kanchanaburi IB for first ever 30 day extension Tuesday 9th. It took less that thirty minutes. They had examples of TM.7 which was very helpful. They checked GF tm30 and she needed one small change on her tm30 record. They checked my tm 30 record everything was ok. I needed application(blue ink), passport, visa (METV), picture of tm 30 page where GF added me, passport like photo and 1900 Baht.