It's a good point about who has final say. I have custodial authority for medical and educational decisions, which is great because I'm the person who does 100% of all school and medical stuff. My ex didn't want to be bothered with that stuff anyway.

I don't think I'd say that the court would "never" require someone with 2E. If you and your ex can agree on it, you can ask a judge to sign it into the legal document. We have several things in our document that other people said were weird or would never fly, but as long as ex and I agreed on them, so they mostly did. For example, we added a provision that if ex and I both agree, the kids can be on MY medical insurance instead of ex's, which has saved us a couple thousand dollars in the long run.