Ixion
I see somebody else is an insomniac solver. Only really able to do this when my wife brought an A3 photocopied blow-up back from work tonight (Friday). Grids C & D complete, and about half of A. Still wondering if I've got the correct symbol for D8AC. It really is mind-blowing. I wish I could stop looking at the wrong set of clues for the grid I'm working on.