I am so glad to hear how well you are doing - and your daughters, too.
As always, do what works best for you - but I would add one word of warning from experience.
All my XH has done, in every interaction about money - including child support - is to claim that he doesn't have any.
He put all his assets into OW's name and is self-employed, so can write his own salary cheque (and hence, can report he earns virtually nothing).
When you have no assets, and report low income, no-one, including authorities, wants to take you to court to uphold any payment agreements.
You might get your X to sign up for a new deal, but nothing can really hold him to it, from my experience. And if you think that your X has a good job and has assets, so this would never be the case for him... don't forget that they can be tricky and manipulative, as mlc-ers.
I think of interactions about money as a game of chess with my XH now. Any move i make to get him to pay money for our kids that he should be paying, he engages in a blocking counter-move.
His focus is solely on ensuring that I don't get 'my way'.
I hope this isn't the case for you, but I do believe that mlc-ers display eerily similar, awful, behaviours.
