Thanks to all the information in this thread, I renewed my visa last week without any problem. In the past, I have usually gone in the morning and last year I waited two and a half hours to complete the process. Last week, I left Thap Sakae at 7.30 a.m. but because of heavy traffic I didn't get out of the bank until 11.15, so I had lunch and got to the Office at 12.40. There were only two people ahead of me, but more arrived as opening time approached. There was no system of queuing, but as many of the later arrivals seemed to be German speaking, I thought that it would be quite orderly. I was wrong. When the Officer removed the chain at 1 p.m., they all made a dash for it, and I went from second place to about tenth or twelfth in five seconds. Despite that, I was in and out in half an hour so, if I am still here next year, I will go in the afternoon and keep an eye out for the Germans.