2 7/8" - Is that from what point to what point? I'm sorta sitting on the buy button for two more QS8's and four of these buggers. I've been using M3's for my SB's, and want to try some Qs back there. But, I can only mount them from the ceiling to accomplish what I'm trying to do. I'd also like to move the side surrounds a couple feet forward from their current position, and I can only do that if I mount them from the ceiling.

If you could measure them again Jay, I'd appreciate it.