One thing for absolutely everyone to bear in mind, that decides to give this a shot, is never ever face a window or a tv you really like

KBs can slip, nore so when people do mid-air changeovers which we don't have in this but it can still happen.
- Chalk is good because after so many minutes the handle will get slippery and grip may give.
- Keep those shoulders retracted, so that the KB is not pulling the shoulder forward.
- And, most importantly, pack that shoulder into the socket when the KB reaches it's overhead position; don't let the arm flop about left to right, back to front when it hits final position...stop it dead, the best way to keep those shoulders safe. Obviously with a lighter KB not so much of a concern but good technique at the start will put you in good stead for the heavier KBs to come, should you go that route.
Any questions, just ask; if I can answer them I will.