Maybe Nik will be able to drop some knowledge...
The R-Hs line also sounds like summat Ru showed me a while back, though I think he left it out of the guide as it was lacking in line... however he may not have done the initial reach that the other dude added.
might have to track Dan down.
Chess Boxer climbs the left side of Grimoire, from a dynamic start off a good crimp for left hand. Good luck.
although paul mitchel will probably claim andy barker did it in 79 with a sac of coal on his back
Funny you should say that, shortly after i'd done Low Rider, I got an e-mail from Paul Mitchell (who i'd never spoken to previously) suggesting he might have beat me to it by 10 years! Turned out he had misunderstood where the line went in the end.