laceys lane said..i looked at that topic. i love the idea of it, but construction looks a bit tricky ad maybe costly if you don't build them yourself. the green board seems to have quite a thick rail. any reason for that

Hi Lacey, here i explain the reason of the boxy rail :
When i shape this green board which is still the second prototype, i start shaping from the tail to integrate the bodyboard's rail and thickness of the bodyboard on a 6'4" round tail blank.
I leave these boxy rails as well, because bottom round rails won't catch choppy water( or at its less) while stand up paddling. Then this board is not made for backside barreling, made for mellow average wave.
With adjonction of the body board flex tail, even in slight choppy unless you get some speed, the feeling of carving is like snowboarding in the powder , this is at least like smooth shocker

As well the rebound of the flex is a bonus in bottom turn or round house cut back.
About construction cost, there is so many sponges to be recycling on this planet or anyway it's not easy to run after wearing flippers as a duck

Once you get the bodyboard,stick with chew epoxy the crescent tail on the laminated board then shape and laminate the crescent tail bottom ; this is just one more building step to do.
I laminate as usual like my son's shortboard, just add 2 carbon patches of 200gram each