Yeah, after seeing your result, I'm super keen to try.
I've got some paulownia sheets left over after my last board build. I reckon that could be used to build a wing.
I'm thinking sandwiching in some biax carbon in between one of the botton two layers would give it enough strength and resistance to torsional deflection.
The top mounted stringy design hugely simplifies the hardest part for most wing builds - the fuse mount.
My biggest concern is my hand shaping skills: how hard is it to end up with a symmetrical wing that doesn't want to fly off in one direction?
Anyway keen to give it a go, hey what's the worst that can happen?
You could also get a stringy surf wing
XL stringy wing is awesome, but it's not a fully fledged surf wing.