Done.
RS Aero Tuning Guide V1 available here;
This Guide V1 was deliberately drafted as a very brief summary as it was to encourage discussion & debate at the Winter Training.
Thanks to Paul Robson for its creation.
c/b is for centreboard, more accurately dagger board. Once you have fully depowered the rig and are working hard to keep the boat flat the last option is to raise the board a little for an easier life. It is an effective alternative to having to let the main flog more.
The other thing on 'Survival' is an edit required that once you are solidly overpowered you can then start to progressively ease the kicker off from its max tight setting to both depower (by losing the leach) and help boat handling.
(thanks to Michael O'Brien of Seattle for pointing out that edit)