Welcome to the boards, I see by your registration date that you have been here a long time. Have you read all the resources?
Cadet will come by if you need him to, but if you already have read all the stuff that he posts, he may not show up. Let us know on your thread and I will speak to him.
For the moment I do not have much to add, except you must let go, as you are doing. It is hard but the single most important thing to do is detach.
As far as the divorce is concerned, it sounds like he is going to take care of his obligations, much of this(the divorce) might be coming from the OW. Continue to validate what he is doing but do not help him get the divorce.
Keep posting and asking questions. The only bad one is the one you do not ask.