From the jugs at the right hand end to the left hand side of the big undercut feature, in either direction.

Hidden 04/Aug/16 Sent
KCheung 23/May/16 Sent
cjcuni ?/May/16 Sent x
LennyJ1 02/Jul/11 Sent O/S
Andy Moles 25/Aug/10 Sent O/S
with -
High f6A+
Mid f6A+
Low f6A+
High f6A
Mid f6A
Low f6A
High f5+
Mid f5+
Low f5+