I have a question about full stacks. Most full stacks contain two full sized cabinets stacked on top of eachother with the head on top of that. I just want to know why? I mean, I kjnow it saves space to stack it, and it fits the name, but I think if you put the two cabs next to eachother, it'd be better. Basically, I've heard some horror stories about heads falling off of full stacks and hitting people. So I just wanted to know if there was a simple explaination on why this is done, other than saves stage space.