In the plans for the wing, they show two spars spaced quite equidistantly between the leading and trailing edges.
In the constuction booklet, they show the area between the leading edge and the spar covered with balsa.and also between the trailing edge and the spar.
It looks like a great idea to strengthen the wing in the event of a (not possible) CRASH! Would 1/32 balsa, perhaps 5 sheets add too much weight to the anticipated weight of about 5lbs.
Martin Moleski would probably say, "Go ahead, be brave, take a chance, try it..etc. And I agree!!!!!!! But...well...no guts!
Thanks! MPPGabriel