I think the last couple of posts give a good indication of the problems this puzzle, and, in particular, the last part of the preamble, represent. It is yet another "guess what I'm thinking of" procedure. Yes it's lovely if you happen to get onto the right wavelength and guess what is going on, but if, like me, you go through the process of solving all the clues, completing the grid, obtaining the first 7 letter word, working out the link between the Across clues' extra words, and the link between the Down clues' extra words, but then have no real idea of the sequence, symbols or colours, then it is very frustrating indeed. I would submit that those solvers who have worked out the last bit, have had to make a leap of faith which is, to my mind, unfair. It seems to be one of those things you either see, or you don't. I wonder what it could be? It's a good way of winnowing the "corrects", but is it within the spirit of the game?