Wing mounting. Fit rear adjuster and front retainer screw. Rear adjuster phenolic and front retainer screw is parallel to wing tube for good on-off without binding. Notch foam in wing core to fit. Slide in donuts and center wing tube. Trial fit wing on fuselage, lightly sand wing root so its a good fit against the ply root rib when mounted. It should be a close fit from the start if wing tube was gluied in wings in hte right spot. Double check measurements of wing and mark incidence points for wing LE and TE per instructins. 1/4 degree of incidence. Take wing off and trim wing tube phenolic at wing root to give you 1/8 clearance to fit nicely through root rib.