In the beginning, there was the ''Gremmie Shackle'', a suction cup on the board's nose, attached to the surfer's wrist by surgical tubing. In 1971, at SURF SYSTEMS, I started using a white PVC 1/2 inch end cap, with a 1/4th inch dia. Nylon rod through it, as an attachment point on the surfboard's tail. Later I started drilling the Nylon rod through the back of the FU box, as a point of leash attachment. Why attach on the under side if the board, you ask? Because it greatly reduces the incidence of the board ''tombstoning'' after a wipeout. Later still, I believe Channin introduced the ''through the box'' leash attachment method. A method widely used by many builders today. Me among them. If you want a cup attachment, I recommend making your own, out of PVC. For the drill through rod, there is Nylon, stainless steel, carbon fiber rod, and fiberglass rod, non corrosive all. And the bonus is that the PVC cup method, is exceedingly strong. It has much more bonding surface area, than the commercialy available offerings.
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