So arrived in Udon Thani on Monday and got the new car and bike licences today.
Monday: Medical certificates (200 baht, 100 baht each), 30 minutes
Tuesday: Residence certificates (1000 bbaht, 500 baht each) 30 minutes
Wednesday: Driver's licences (760 baht, car 505 baht and motor bike 255 baht) 90 minutes. This would have only taken 30 minutes as well but the licences referenced my old passport and not my new one. I didn't have my old passport or a photo of it so my mum had to go around to my house in Australia and take a photo of the old passport which they then accepted.
So what was needed for each licence: Medical certificate, Residence certificate, copy of my passport main page, visa page and the page with entry stamp. Also had to the online DLT training and show a copy of the QR code showing it was completed. Also needed to show them the QR code for the booking appointment time for today.