I'm playing a gig last night and although it was a bit overkill for the size of the venue my guitarist and I both brought our full stacks. Earlier that day I had just finished restoring my '75 V4 412 and (with some advise from Johnk) put in four Deltalite 2512's. It sounds amazing but I didn't have time to test it out with the Avatar 412 and mess with the eqs before the show...such and idiot am I Halfway through the first song I turn around and my head is vibrating off of the cab! I pushed it back a little with my head and turned the bass knob down at a rest in the song. After that I couldn't really concentrate, being too worried about the amp. What's there to do? I have a Hartke LH500 and with the case I built for it it weighs in at around 50lbs. My initial response is that this wouldn't have happened if I had a much coveted SVT but that's a little ways down the road for me, financially speaking. I'm not opposed to keeping the head on the floor it just seems annoying. Is the combined vibration of a stacked set of sealed 412's always gonna result in me freaking out mid-show? Would it be better to put the cabinets side by side, head on one? Is there something better than bungee cords which isn't a pain to install? Where do babies come from?