You sound good. I'm sure you're relieved that you have part of it under your belt now. As you know, I also went with Collaberative Divorce/Mediation and frankly - I could have written every word that you wrote. No - it was not easy but it is faster, cheaper and more effective. Things get settled and everyone knows where they stand.
My ex, like yours - looked more like a jerk every time he opened his mouth - but the lawyers have heard it all and they truly know what is going on. I felt, in my heart, that justice needed to be served but trust me - you'll never get THAT satisfaction. Because it is not about who is right or who is wrong - it is just about working out the finances and what is best for the kids.
Hang in there - you're doing awesome. Glad you reported in. I know you are starting to get your head around it and seeing a future for yourself without him. You will be fine. Even better than ever.