Is it proper form to strongly externally rotate the arms (I think of it as screwing the hands into the ground; though the hands don't actually move, I find it to be an effective cue) at the lockout of each rep? I've actually found that this external rotation feels good throughout the entire descend/ascent/lockout because it keeps the elbows in to the body.
It also makes the exercise significantly more difficult, which is why I keep hitting the mastery reps only to find that if I really implement this cue I struggle with even 4X12reps.
Also, on the descent (with the elbows in mentioned above), I've been using a cue of moving back towards my feet on the descent, I sort of backwards slide during the negative so that the back of my hands almost touch the top portion of the anterior delt. It's a little hard to describe, but like the external rotation it seems to tighten up the movement while also making it significant more difficult. Am I over thinking things here, or is this just getting maximum return on my basics?