I usually end up with the bar at the base of my neck instead my mid to lower traps. I just can't grab the bar because of shoulder discomfort. It ends up causing pain at the base of my neck. As far as foot position goes I typically end up with my feet in a sumo position. It was always due to knee discomfort, but I think I will try bringing them together a bit more and pointing my toes outward.
I refuse to do half squats, so on squat day I start with body weight. It usually turns into a squat clinic because I progress throught the weight slowly. I used to do the half rep crap with super heavy weight, but that's selling myself short. It is ass to grass or nothing.
That being said, I also substitute other exercises with similar motions to blow the legs out....like land mine squats, modified hack squats with a barbell and squatting between two benches with dumbells. None of it....especially super heavy leg press.....will ever replace quality squatting. I am just looking to be able to perform better.
I know I get little to no glute work from squats. Maybe it is leg positioning. I will try adjusting tomorrow, but I don't expect to really go heavy until I figure out how I can grip the bar effectively enough to get it off the back of my neck. I have found that weighted glute bridge from the side of a bench....as feminine as it may be....activates the glutes, and it gets them fatigued prior to doing squats and stiff leg deads.
Any suggestions how I can destroy the chicken legs would be awesome though. I do legs twice a week.....once heavy and once for volume. I am going to try a format similar to the one in your 3D chest video. After squats, I will do 4 exercises, 10, 8, 8, 6, 6 and probably finish with a hammy curl and extension blowout, maybe 10x10 with 10 seconds rest.