And to add further to the confusion:"petje - I am far from being a gritstone expert but F7b (v7) felt about right for Mark's Roof and F7a (v5) feels about right for the one just left."What's with the grade comparisons? I know this no longer matters in the Peak, especially as the grades in Ru's book are spot on for this roof (and of course everywhere else, with the possible exception, ahem, of, ahem, Boozy Traverse, ahem), but since when has 7a equated (albeit approximately) to V5, or 7b to V7? The only place I've ever seen those grade comparisons is in the OTE 'how to' series - and then I just assumed it was a proof reading error.
What's with the grade comparisons? .....
must be the smog