What is the process and requirements for obtaining a 30-day extension in Kanchanaburi?

The user successfully obtained a 30-day visa extension at the Kanchanaburi Immigration Bureau. The process took less than thirty minutes, thanks to the helpful examples of the TM.7 form provided. Both the user's and their girlfriend's TM30 records were checked, requiring a minor adjustment on the girlfriend's record. The user provided necessary documents including a completed application in blue ink, their passport, the METV visa, a photo of the TM30 page, a passport-like photo, and paid a fee of 1900 Baht.