You could easily raise the trailing edge 1/4" for starters - make allowances to raise it more
the flat bottom of the wing is just a referrence line.
the true zero lift line is up to at least the center of the leading edge
with good ailerons - take out all the dihedral THEN use a slightly raised position for "center "of ailerons.
keep the weight down -big chunks of wood do no good strength wise - add some beef to the fuselage sides which take th engine loads