Dimples are from under glass or sanding thin.
there are 2 types of kite surfboards.
#1 light and flexy made for kitesurfing not for doing airs. rides like a surfboard should if you were just surfing
#2 heavier and strong made for long life and putting it through it everything. rides some what like a surf but with less flex
You can not get a strong light boards. there is no way... I have been at it too long and tried to make one with no luck. We have made a kite surfboard that one of our team riders rode for 4 years doing 15-30' strapless airs but it was a heavier board. I tried something this year for him and the board lasted 2 weeks.
People get pissed when you sell them a $800 + kite surfboard that doesn't last. I really don't know what people think some days. hell a kitesurf board has 3 layers top and 3 bottom of glass most of the time. with a foam core. a twin tip has 2-3 layers top and bottom with a wood core and they snap. ( and 2 of the layers are tiax)
I like the one reply and he hit the nail right on the head about surfers... they plan on buying a new surfboard almost every year if not 2-3 times a year.
There is no real bomb proof boards , there are some that just last longer then others.
I have fixed more boards in the last 2 years then ever before. more foil boards then anything from doing 40-50' airs
just my 2 cents