Anyone done this? I've been gigging with the RH450 head/RS210C combo cab for over 4 years but I just added the RS212. I was thinking I could just take the 2x12 and head but for some gigs use both. I wouldn't normally mix 10's and 12's, or 10's and 15's or whatever, but this seems like if nothing else it'd hit my ears a lot better. Anyone done this? Moving the top cab forward and back allegedly affects phase.... anyone had problems with that?