INJURIES- strained patella tend., strained groin, one hero I know(Ill leave his name out) even blew up hip whole hip, unloads 550 on box hears loud pop, BINGO he is now an EX-powerlifter.
I know that the exercises are performed buy many of the sports greats but my experience is they dont work for me(Itried) and seen bunch of tough dudes get fucked up. So people like sniffing salts, I hate those too.
As for a monolift- under max effort, they probably are "safer" but I dont have access to one and We cant use them in competetion.
What about the squat unloads? 2 pins , more balance, compression off spine.