Hmm thing is, my torso is never parallel to the floor to begin with. Not even at low weight, not even at the starting position. Hell, I have even tried to get it corrected at home when I'm free - with imaginary barbell - and I still dont get that. I have read that what matters is that the back must be neutral, that I could maintain. I'm just gonna allow my torso be slightly upright, it might hit slightly different area of muscles but still acceptable I suppose?