foam board balsa build

This is Reserved for my Attempt to build a PRANDTL WIng as featured on an FTCC when they spoke with NASA engineer. The one that flies with *proverse* Yaw I looking into it here: http://www.amaflightschool.org/PRANDTL and https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-106-AFRC.html...

I have kind of looked around and have seen a few ideas. But, has anyone tried to scratch build a balsa style plane out of foam board. You would probably still have to use some plywood and hardwood in some areas, but the wing formers and such could be built out of Adams foam board and then...