I've swapped my M80's a few times and always wonder if it really matters what speaker sits where.
I found a overhead view line drawing for LFR's but haven't found one for the M80's.
I'm not sure it would make a big difference now but I'd still like to know.
3 M80HP
2 QS8
2 QS4
ADA 1000-4
Seymour XD
7'x 12'x 21' cave
3 Paradigm subs