going on three seasons with a poly HPLB ridden a bunch in well overhead punchy beachbreak, glassed 6, 4/6 all S cloth, 3" at center. Fairly light, not a stress line to be seen.
Chatted with a board builder at the beach yesterday who builds only epoxy, double 6 top and bottom, and runs carbon fiber overlay strips nose to tail on top and bottom of his personal longboards, has yet to snap a board with that combo.
Have seen a lot more broken Surftech longboards over the years then custom made lb’s. Rigid shells ( the problem?) seemingly weak guts.
Stick with a custom, talk to your shaper about how to trick out the glassing to make it stronger while keeping it light enough. If he contracts out his glass, talk to them about it.