Pax, ask specifically about the offer of judgment because it will cost him a fortune if he pursues it and loses. It will also appease him in that you are admitting you are responsible for it. The reality, you aren't, you are just setting him up to have to pay your attorney fees from the time you make the offer if he pursues it.
I know its hard, but if you give in to his petty and ridiculous nickel and diming, he doesn't get the energy (and you don't have to pay your attorney to deal with it). If you are gray rock, and give no energy, it won't be fun to poke at you any more. Remember its about the fight, not the money. No fight, no fun, no fun, find someone else to mess with.
Every time I push to get the divorce resolved, mine runs way in the opposite direction. I am so far past done now. I am just getting ready for trial and letting the court decide it so I can be done and move on.