I don't know, man. Hacks are ok in my book, but your knees are no excuse. A well performed squat is probably easier on the knees than anything because there are so many supporting muscle groups involved, but it's your body and you know it best. But if it's solely your ego that's preventing you from putting the proper weight on the bar, then you get no pass from me. Man up.

I love that you've come back to legs. Better late than never. Keep putting in the work. It's obvious that you have the drive and dedication.