I started MN/SE1 tonight and had a question about proper form. I noticed that I was there were two options to the hold.
1. Raising the knees to hip level and letting the hips move slightly behind the arms. Gravity pretty much settled me this way.
2. Raising the knees to hop level and holding the hip socket in line with the arms.
While the second option is much more challenging, I am assuming it is correct.
I added a video link below to show what I am talking about.