My visits to CM Immigration started in Jan 1990 when I asked what I needed to do to stay in Thailand, married to a Thai national. There was only 1 guy behind the desk in the old building on the left. He had to telephone Bangkok for guidance, and told me to apply for a 1 year extension. I filled in the form, gave him my passport and marriage certificate, he stamped the passport, and returned it with notice to return in 2 weeks. I returned every 2 weeks for about 3 months before getting the extension. I returned every month for the 90 day report and signed the book, sometimes the officer would say he couldn't find the book and to just come again next month. The first new building appeared years later, but it was easy to visit until the early 2st century. Then it got full, and I switched to a Retirement Visa. It got really bad when they switched to the Promenada, then Big Joke appeared, and the 2nd new building arrived. Since then it's been ok as long as you have the time.