Iv tried everything and my form just isn't how I want it and Iv been stuck at 500lb deadlift for at least 6 months and can not get a lb over it.I have extremely short arms and for sumo I can't get my chest up because my ass ends up so low to do so. I also have been trying to do 3" block pulls to learn the ideal position and I can get into the perfect position off the blocks but on the ground I can not get in that same spot at all.
My back tends to round on the sumo and I have very long legs so I have to go wide. It may have to do with mobility but I cant see to get more mobile opening the knees up iv tried a lot and nothing is working really. I get very deep on squats and dont have any mobility issues except this.