For the timing of your leg drive once you're set up... your legs are going to be engaged pushing your body northward, and it's going to increasingly go up as that bar comes down. So as that bar is lowering I'm putting 60% pressure on my legs, then 70%, 80%, 90%, until I touch my chest. Once I touch my chest, I reverse all of that. My legs drive as hard as possible: 100% pushing my head towards the top of the bench and that bar will start going up.