From past posts here, & conversations with other marshals, it has become apparent that there is a lot of confusion surrounding the grading scheme.
Inspired by Alan Green's excellent 'Beginner's Guide to Marshalling', I 've put together a few thoughts on grading which may help to answer some of the questions, now on line at:
http://web.onetel.net.uk/~davebrand/grading.html
Any comments, criticisms, even praise, will be gratefully (if not graciously!) received.