It was a partial failure. In a hard turn at short line the flow is wrapping around the bevels and sticking to the rails, creating lots of drag at 35 on up.
Version 2.0 should fix that.
On the other hand, it looks like I didn't affect the flex on his new N1, and the new single line knee harness also looks like it will work.
Main reason for this post is to thank @OB
for his efforts and willingness to strap an untested device on his feet and go skiing. He's THE MAN.
We're doing this long distance, so the effort he's putting in and the unknowns he is facing are considerable. THANKS @OB