IN a P3 of 60 or 63 I don't think you can find reasonable grouping of conferences where each new team maintains an existing rivalry with 2 of the EXISTING members of the new conference outside of the 1st conference selected. For instance I can pick 6 with established rivalries for the SEC but you won't be able to do that with the new teams the B1G picks next. The B1G is going to go with ND, NC, Duke, Va., Va. Tech and Pitt or Syracuse. Oustide of ND all of those schools really only have rivalries or a history with Maryland. So unless only the SEC in a P3 has to have existing rivalries I don't think you can make it work.

Also, in a P3 where you have 3 pretty equal leagues I think a little horse trading could make sense. I don't know if that would still be against the rules because the SEC & B1G would theoretically have their advantage cut into by consolidating to 3 leagues. There could still be a money difference but it would be smaller and teams could decide a better fit is definitely more important than the small revenue difference.