ME squats at Ripped fitness on Monday

I actually felt pretty recovered from skiing on Sunday so I decided to do max effort squats at Ripped fitness on Monday night.  The squats went as follows:

Bar x 8

Bar x 8

135 x 5

135 x 5

225 x 3

315 x 3

365 x 1

405 x 1

405 x 1

315 x 1

I video-ed my squats, and I'm noticing that without a mirror to see myself I'm *always* missing parallel ( some of this is probably because I skied yesterday ).  I'm not sure what to do.  Stump says that when you feel your hips turn, that means parallel.  I clearly get to parallel when I'm squatting in front of a mirror, but I think I have better form without the mirror, but I don't feel any difference between that and my squats yesterday.  I could have sworn that I was getting to parallel, but when I played the video I wasn't.  I guess I just need to start going to what I think is WAY below parallel.

The good thing is that I was squatting with my toes to the rack ( ie wider ) and this makes my shins more perpendicular to the floor at the bottom of the squat ( and which is probably what I was higher than I thought I was ).

I then did 4 sets on the leg press machine with my feet as wide as possible.  This leg press machine is strange, if I try to let it go down until my knees are 90 degrees, it hurts my knees.  But if I go down to what would be probably a quarter squat, I really can feel my hips and glutes working, so that's what I did.  I think hip strength is my limiting weakness on squats.