The wings are a bit more complicated than the average foam panels as only the underside comes ready skinned with balsa sheet. The instructions are very helpful and cross-section shapes are provided for checking progress. The process is a lot simpler than it sounds and the result is a better looking wing than found in most Spitfire kits. You also end up with a workshop covered in polystyrene foam beads. After the wings have been skinned the balsa leading and trailing edges may be added in the usual way.
Ailerons have to be cut out of the wing panels and finished, along with flaps if required.
No undercarriage components are supplied, as the manufacturers expect you to choose and fit a retract set. Fitting such units is a straightforward job, but care must be taken to provide a mounting plate of large surface area bonded securely to the wing. The wing is built in three panels which are then permanently joined with epoxy resin, the joints being reinforced with glasscloth tape. Wingtips are laminated from a thin ply core with thick balsa sheet above and below. These are a weak point and need to be firmly secured to the wing panels, preferably with glass cloth and resin over the joint.