In reply to CurlyStevo:
> (In reply to Paul Hy)
> Eastern grit tends to have more holds, breaks and ripples (especially stanage popular) than western grit / yorkshire grit and therefore isn't as good overall for pure crack climbing.
>
I don't think that's the case, there are oodles of crack lines on Eastern Grit at every grade and degree of purity.
Frogatt is particularly good, although it's more well-known for its slabs. Working up from the mild Sunset Crack, to Diamond Crack, Hawk's Nest (proper VS jamming), Broken Crack to Valkyrie (very pure but awkward jamming on pitch 1) to the classic Chequers, will turn you into a crack master