I have been comparing my own execution of these exercises to those in the demo vids and, as a result, I have come up with two questions.
Firstly:
I believe that I am executing the WR/PE2 & WP/PE2 correctly from the shoulders up (not clearly visible from my videos), but when it comes to the position of the torso, the athlete in the vid seems to have more of a hollow position. Is my body position acceptable as demonstrated below?
Secondly:
For FTP/PE1 my hand is somewhat "cambered". The demo athlete has a flatter hand. Is this cambered technique acceptable?