I will say though that the Hyfy board a friend permanent loaned me years ago, is the best construction of a surfboard I've owned. Even though it clearly had manufacturing defects, with pieces of the external epoxy flaking off at stress areas and dark areas immediately after purchase, it still held up well. I was expecting it to fall apart but it's light and strong and has been extremely durable and maintained its liveliness and brightness over the years. I've never repaired it and have left the defects as is. And honestly it's lighter, way whiter and more durable than the less than one year old XTR I have (the JS is maybe 5 years old now?). obviously not a scientific comparison at all and I don't go through as many boards as most of you, but I've tried a fair share of alternate constructions and poly boards with various foam densities and glassing schedules.
For a groveler seems it can't be beat.
I was incredibly skeptical and bought a Flaming Pony new for $400.
The lamination is impeccable.
I have ridden the sh!t out of the board, had it in waves up to head high and the thing is still in flawless condition.
Not a single pressure dent, crack, ding of any sort.
It's been thrown on a few airplanes in multiboard bags too.
Not interested in one for anything other than a groveler though, seen too many boards for bigger waves buckled.