Solid Wood Boards

If attempting a method something like that chambered pine bellyboard from Cornwall, then the chambers could be staggered. That would decrease the glued surface area, but could be better by offsetting the weak points. Plus it would connect all the chambers into one air chamber. I think that’s a good thing.

Do google searches on specific gravity wood, and you’ll get stuff like:

http://www.simetric.co.uk/si_wood.htm