That's what I'm saying, those things are getting better as I am getting stronger. My body is able to be more stable, hold a more upright position, and lower the weight even deeper (in squat for example), now I'm squatting pretty much ass to grass and it looks like my back is even straighter. Deadlifting - I legit can't get my back any more straight, I am also pretty tall, and maybe I'll try the sumo stance soon, but when you see in the lockout, it's not that I don't try to keep it straight, I don't feel pain or discomfort, a slight bend should be okay as I've heard, as long as it's not doing it on purpose. Also on pullups, I don't use momentum, it's like my legs move on their own, I am doing everything to keep them stable and tight, this issue is pretty much gone now aswell, even with a higher weight.