Thanks for your reply, but I did have enough pages to extend my Visa. As I said, I successfully extended my visa. My question relating to my new passport was, do I really need to have Thai Immigration transfer my extension stamps to my new passport before leaving Thailand, or not...?
An Elite visa application might be in my future, so your comment about a max of 2 overstays has my attention!...! Can anyone else confirm what Stuart is saying?