Cor, there is something odd there  will see, tks. Re. the diagram, actually I probably have a version with those extra arrows as well, but in theory since one could go every which way forward through the steps I dropped them in favour of the 'nominal' class-by-slass route.  The coloured 'stream' backgrounds at least show that A is the next step purely in MilHist terms after B, and FA comes after GA in WP-wide grades. Plus I have the disclaimer in text just before the diagram that this is not the only route through the classes... Whew, rationalisation complete! ;-)Cheers,