My opinion is that custody should stay about the same as it did before the D in most cases. I mean I have kind of the opposite thing going--H wants more custody so he can pay less child support although he doesn't really he has a hard time just seeing them the one day a week usually cutting that day short; I mean I think he wants the support $$$ but not really the parenting duties & responsibility.
I think in cases like yours where you were equal parents then 50/50 is fair. In my case, where my H was seeing the kids less than 10 hours a week, the one night and every other weekend is more than he did in the past 15 years and 50/50 would be crazy. I think if all of a sudden someone is radically upping or wanting to decrease their spouses hours with the kids after 10-20 years of doing differently, it seems to me that $$$ is their motivation rather than the best interest of the kids. Karen