Thanks MLC - The custodial stuff is really tricky given what has been going on in my sitch (not going to repeat everything here). But I am definitely worried how it will all shake out, and exhausted trying to walk the tightrope during this separation. My understanding is that in my state (and most states today), they start with a 50-50 assumption unless there are compelling reasons to change.

The 401k contributions comprise such a minuscule amount of our total assets that it is a don't care for me. What is more troubling to me is the exhausting back-and-forth over these little financial items, which concern my W very much.