1) Weigh parts 1- 4 (and the two spacer strips) and if necessary re-arrange
them so you will end up with left and right wing panels of equal weight.
3) Using a razor plane and then a sanding block, profile to 3/16'' at the leading edge and
1/8 at the trailing edge (draw extent lines if necessary).
5) Cut a groove and insert the aileron torque rod. A tube is
not necessary but if you insist on using one there is sufficient balsa depth!
Round off leading and trailing edges. Your wing panels are now finished and should look like this!
Chamfer the mating surfaces and EPOXY the wing panels together with the chosen dihedral under each tip. DO NOT insert spars