That particular center stick was the type used on the Nu’uhiwa light weights, so I would say '67, Tinker was firmly opposed to concave noses and felt contests should be divided into the 17" and under and the 18" and over catagories.
I cannot be absolutely certain, but I think the idea of Challenger Easterns was one of the reasons for the move to the East Coast, it’s unlikely any were done in Sab Diego.
As for the boards purchase on the Cape, Dave Summers had a shop in Nanatasket, Mass, sold a lot of boards, only natural for one to wind up on the Cape, I know of several on my boards from that era that are in Monument Beach on the Cape.
In the winter, Tinker would break out all the rail trimming from the past years glassing, we would cut them all to 30 " and “shingle” them on a layer of 1-1/2oz. mat.
After a tower of them had been assembled, it was off to the lay-up tables, a sheet of plate glass with a small flourersent fixture under it. Tinker had one layer of 10 oz. taped along one edge to the table, lay out a mat and scrap, pull over the 10 oz. and wet out.
Then a sheet on visquene was layed over than and rolled with a rolling pin, with the light under it, you could see every single air bubble creep out past the edge and be gone forever, the 10 oz. was then peeled back and another layer of mat and scrap, repeat until 7 layers ahd been applied, the 15 psi of atmospheric pressure kept the air from creeping back in. When the sheets were off, peel the visquene and the result was a fiber glass fin that was nearly as clean as molded plastic, never any pin air.
Bahne used the same technique for a while, but scrapped it for faster lay-up times, they have an air problem to this day
