if all is straight and strong weight is held down - nothing to fear-
that design would fly fine with 10 % airfoils if the weight was held down and the wing were strong enough
all of that era pattern planes used kinda fat wings to allow for higher AOA on landings and to make em strong enough. we ended up doing 12% root and 10% tips on our last Tipo designs -also kept dropping weight - down to about 7 lbs - It all just got better .
Back when -I saw some of those at up to 11 lbs-