In reply to JimboWizbo:
I'd agree that the difficulty of The File is a tad over stated, the jamming isn't that hard but it is compulsory. Unlike a lot of gritstone jamming routes doing it any other way is *much* harder.
I'd also agree that it's best left until you're proficient though. (No need to be solid at HVS, for a happy jammer it isn't particularly hard at VS.)
> 20 foot crack at burbage north
> Only allow hand jams, it's great.
Maybe if you have very thin hands. It's an unfriendly off-finger size for me (for most, I think, I don't have particularly big hands), and horrendously polished.
If we're recommending short Eastern Grit routes to practice on, Dog Leg Crack at Curbar is where it's at.