As an experienced garage shaper interested in technolgy who build boards for surf mates for long time i try all kind of tech to make light but durable boards. years after years my mates want stronger boards, so i made them stronger stiffer and heavier. they like them so i though my shape progress. last days à guy want me to repair is way to fragile carbon warp super light, he complain about chatter and durability, i give him ones of mine heavy board to wait. he come back, he like the board, no chatter, drive… the shape is a basic hp shortboard like everyone 6x19x2’3/8 in the 28l range but at 2’8kg it’s on heavy side. build 1.9 eps, carbon/glass omega stringer, 2x4oz bottom, 9oz biax+4oz deck all layers wrap rails, sanded poly gloss finish. i take care to be at this weight with all this material, seal foam, minimal resin use, cut laps and preps but it’s heavy, my skin are stiff hard to dings, boards lightly foot wells, rails overprotected no more leak repairs. but no one complain about stiffness, chatter, blabla any more i only have fins repair but they know way…
So eps epoxy need to be build strong and heavy ! LOL