I've gone an done it now
OK, so I've started taking down some ideas for the 15mm Beer&Pretzels rules. I'm going to try the "endless bounds" from Crossfire as well as possibly a modification of the ranged combat rules. Though I think what's starting to emerge isn't quite similar to what I had in mind for the 6mm game. Which is fine. I wanted the 6mm game to be about a brigade combat team or more and the 15mm game to be a battalion sized slice of a BCT or so.