Continuing the discussion regarding
"the knuckle" which was/is one the tenants of Greenough board design...
I came across this mid-70's shot of Jeff Hakman dropping in at Pipeline. The "stock" rocker set up from that era -- apex well forward, with a semi-straight bottom curve running through the tail -- accomplished two things at once. It was flat enough, nose to tail, to generate a lot of lift and drive, while at the same time had enough of a "bump" in the front 1/4 to handle serious adversity...as is clearly visible here.
Today's boards have done away with the forward apex/knuckle, and settled for an overly generous curve running nose to tail that doesn't come close to maximizing the rocker's potential.
Just my 2 cents...