What's the beta for the chip sit method?
I've just rediscovered this edit of Peckitt doing the chipless sit at 1:50 and then at 2:07 he's suddenly climbing it with RH on the chip before bumping it across to the poor sloper.
This next video shows the chip more clearly (in the green streak), for anyone who's interested.
With regards to the grade of the chipless sit, I climbed it this way and thought it was comparable in difficulty, and style, to the 7B's at Earl.