Bighorn frame mod
I had a 78" Bighorn type frame (+ a seatbar). I bought 92" siderails and cut one 78er down for an extra cross bar (saving other 78" bar to cut in half for small day frame).
Now I have 2 bays up front (cooler, drop bag w/ top for paco pad lounge), foot bar and seat bar in rower's bay, and a bay behind the seat. This is enough space for me but I could always add another cross bar, remove seat bar, and sit on a drybox if I need more space.
Buying the longer side rails was about $100. Plus 2 lowpros - $150.