You're a pretty cool ex wife. My ex wife is pretty cool too. We're always able to work out stuff like that with no issues. We split everything about the kids right down the middle from time spent with to out of pocket expenses, clothes, haircuts, yada yada.
Mine are older now too and I'm watching with interest the choices they make. My #1 son was the hard worker self motivated, G&T student, 5 year masters in CS. Resume with COs like Lockheed, Google. My #2 son was the party animal slacker who dropped out of HS and got a GED. Well now he's doing F/T community college and even a full summer schedule, plus working a 20hr/week part time job for gas and play money. My #1 is intentionally unemployed and trading currency with a modeling program he wrote over the past couple years. Total 180 degree flip flop. I'm just watching with interest...