@Andrew ********
If you're going onto Non-O (over 50), make an appointment at CW. You go to Section C. Take bank book, bank statement, lease, TM30, passport, and copies thereof. 2000 baht cash. You get a 15-day under consideration note. You return on the nominated date and get the 90-day visa stamped into your passport. Takes about 45 mins the first time, about 20 mins second time.