I tend to lock my arms and sit up on really hard braking......if I have my arms bent on hard braking then my biceps take the brunt of the force and you'll find it pretty tiring after a while - locking your arms alleviates some of the effort needed to support yourself upright. Just before the turn I slide across the seat a bit to get or weight to the inside, I then try turn in as I come off the brakes at the same time - it makes for a smooth transition if you get it right. I tend to move about quite alot on the bike - I don't weigh very much and I sometimes find it a bit of a struggle to get the bike to change direction quickly when I'm going quickly - larger blokes probably don't have a problem. Same as Domski, although I've not got any c-strips left on the Pirellis, I don't tend to get me knee down either......probably because of my stubby little legs only just touch the ground when stretched out anyway
Braking and cornering are inevitably linked.......brake too hard and you turn in a bit early and end up making a 50p of the corner and brake too late and you end up stopping, turning the bike sharply and coming out of the corner in way too higher gear. I think the best idea is just to try to keep it smooth.