What I've read and heard from others in the same situation is that 2-2-3 only works well if the kids are under 6 or so. It's 18-20 transitions a month, and they really end up "living" in neither home. But it apparently helps if, say, a very young child just can't go more than 3 days without (usually at that age) Mom. As the kids get older, and they have real homework, tests and social lives, they tend to want and need longer in each place so they can set up and have some structure. Even going 2-2-5-5 is 9 changes in a typical month, which might end up being too many relatively soon, especially for D13, in which case you're just looking at 7-7 if you want alternate weekends. Whether it's 5 or 7, those gaps are going to be hard. We did explicitly build in that parents have 100% access to call, text, Skype, etc. when not having custody, outside of the dinner hour.
Ugh -- just trying to put that on my Worrying Backburner. It will be bad for sure, but if I think too much about it now, now will be bad (worse), too.
Me: 46 W: 44 Married: 17 Together 21 D13; S10 BD: 03.03.15 (Not attracted to you) Almost 2 years trying, alone, to save marriage Status now: Divorced (effective 06.13.17)