RE: scratching new wings for old ARF
Looking at pics online to figure the wing details: the airfoil has the same top side profile as the fuselage, the wings plug-in, has flaps(?) and the wing has an outboard drooped leading edge that is stepped (for stall prevention). If span unknown then use photos to figure the dimension as a percentage of tailspan. You can keep it simple and build washout into the wing in lieu of the stepped leading edge. Draw basic wing planform shape to get rib lengths. Rough cut rib pattern blanks and separate each with blue foam for final sanding. I strategically drill the rib blanks to receive threaded rods. Wing nuts secure everything for sanding fairness to ribs. Use these as patterns to make actual ribs. Other than the plug in for the wing the rest is basic. You could even build the wing with less sweep, more span and, thus, more area.