That's how these things evolve - thank you. The D901's parallel to the D840 which is on the route - I favoured that one because (a) it was the one shown to me by one of my tame French road testers and (b) it's a flat-out hooner's road (ahem, I mean, a 90kph limit but with fewer villages) with a memorable climb after Valady. Not so much to see on it, though. I can save that info up for the next one and offer two options.