1. I wouldn't use box squats for size. That would be standard back squat/front squats
2. Box squats have no emphasis on posterior chain?? It's purpose IS for posterior chain development. Unless you're trying to say other wise.
development of what...your ego?
is your kid training for a powerlifting competition?
what is the point of doing a 1 rep max on anything?
btw - why do you even bring up "liberal"
what does your ego boost have to do with politics?