I invest is a front squat harness. Well worth it!!! But yes, they are hard and painful if use a lot of weight Position (at least in my case before the harness) was about two inches below shoulder joint. I do same day as back squat, good mornings and dl. Yeap, all in the same day!!!
600/400/500 @198 WT class (40-44)
Only those who risk going too far can possibly find out how far they can go!!!