For those who tend to pitch forward when the weight gets interesting, Box Squats work like magic.
This is what I'm looking for. I will still go very sloppy and pitched on at least one rep of a 4-5 rep set, and I want to bring that down to one out of 100. We use the safety bar for box squats in my gym generally, which projects the weight out forward of you, so you absolutely must be thinking "chest up" or it doesn't work. You either do a good morning or a squat, but you can't fool yourself with something in between.
Kenny, it's hard for me to tie my experience to the information you provide. I don't know much about Simmons vs original Westside, but I was taught to keep my back tight but let my legs go loose, to deliberately abandon the stretch reflex and gain power coming from a dead stop.
What I am confident of, in decreasing order, is that it gives much needed practice in form (see previous paragraph), carries some to deadlift because of dead stop feel, and supposedly adds to what you can do if you already know how to make use of the stretch reflex.