layers have to be bias cut, so the fibers are at 45 degrees to the axis of the boat. That way the cloth will adjust to the convexity of the boat ends. Largest patch first, then concentrically on down to the smallest.
This is complicated if you've never done it. Are the ends worn down through the ABS into the foam layer? If so, then some prepatching may be needed.
4-place Boat Trailer
Full Size Sail Rig
The Kayak Wing
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