I'm just a beginner in powerlifting and have been training for 2 years. My deadlifts have never felt right. I believe my knees keep coming forward so I don't maintain vertical chins, but also I find it impossible to get the optimal back position. If I try to get my back at 45 degrees then my hips will be way to low and I lose tightness, if I keep it higher my back rounds. I never get pain from deadlifting, and a physio I've seen said I'm ok to deadlift with a rounded back based on my joint structure and whatnot.
What can I do to improve my technique? I've tried stretching hamstrings numerous times already. I do Stiff legged deadlifts and romanian deadlifts.
I would also like to know what you think my body structure is? (length of torso, legs, arm) based on the form I'm using, so perhaps I can use that knowledge to adjust based on my leverages. I would say I have pretty shit or average at best leverages for deadlift though.