OK, here is this weeks effort. This was pretty much a 5RM effort at 375 pounds. http://www.youtube.com/watch?v=8148ULmu8KQ.
I didn't do much overthinking for this set. My thoughts were get tight, chest up, go! I think the form is decent, with some areas for improvement, but no immediate cause for concern. Shoulder position over the bar seemed better, though the bar path does still seem to move in a 'C' type movement. Upper and lower back seem stable over the course of the movement, though it seems each could be extended a little further before starting the pull.
This was followed by 3 "Boring but big" sets of sumo deadlifts at 185 for 10. I've only done sumo deadlifts twice, so I wouldn't mind a critique. http://www.youtube.com/watch?v=asqLfo6YX-U
It seemed like with these, I can get my lumbar more into extension before the pull starts. Is that because of the wider stance? I did check my conventional stance and there is 4" between the heels of my shoes (or 6" between the center of my heels) with the toes pointed out at about 15 degree angle each. Should I try a slightly wider stance for conventional pulling?
And one last question. Based on what you've seen with my conventional pull, what would be the best supplemental accessory exercise? I picked sumo because I feel weak in that position compared to conventional and also wanted to target my quads for some additional work. Indeed after these sets of 10, even though they were light, I could really feel it in my quads and abs. But I could make arguments for doing Romanian deadlifts or deficit deadlifts instead.
Thanks again!