Wall

Sprue "A" 4 Pieces do not appear in the instuctions. A9 x 2 and A10 x 2. I have spent HOUR trying to fit the Wings to the Fuselage. Where do the Fit ? They look like Wing Profiles and should have been (CUT?) before the wings are assembled. Also , the Spar is 1mm and the "SLOTS" in the fuselage is 3mm. Totally confused with this kit,