OK, most of this is old news to me. We all realize that the posterior chain is what makes or breaks any squat. The quads are prime movers, but having the quads too strong compared to the glutes and hams can cause the knees to extend faster than the hips and get you into a chaotic event.
As far as my training, no, I am not using Westside (gasp!). I am using conjugated periodization, however. I do squats (or good-mornings, GHRs, etc) on Monday, deadlifts (all sorts) on Thursday. I want to add sort of a DE day on Saturday, using box squats most of the time. I am not training specificly for powerlifting, just to get stronger in the lifts I like to do.
As far as my squatting style, my feet are about shoulder width apart, and I go down until my hamstrings touch my calves. I guess I don’t know if this is what is meant by “Olympic style”, so forgive me if I was wrong, but I just don’t like the term “ATG” and was looking for some other way to describe it.
As far as my question, I’m just wondering about the reasons for different box heights. I want to vary the box height on my DE days and occasionally use box squats as an ME movement. My sticking point is slightly above parallel.