First off, I want to say that this is one of the most impressive videos I’ve ever seen in my life, period. This is awesome, congrats!
Is there a reason why you choose to pull double overhand instead of reverse grip? I’ve noticed Layne Norton does the same thing (double over) even when pulling 700+. I’ve been doing conventional deads for the last 2 years (the entirety of my deadlifting career) and just recently switched to sumo, but for conventional I always used a reverse grip when I went heavy.
Obviously your grip strength is crazy but please explain why double over is preferable to reverse in sumo. Thanks, and congratulations again!