Sol's nose and canopy with ply covering all exposed end grain balsa
Remove the canopy and there's plenty of room in the cockpit
Sol's bottom! OK sub fin
Underside of Fourn's balsa/GRP wing top skin, not much depth to fit a 11mm wide servo so it will be glued in position
Both Sol and Fourn have underwing fairings. Sols was pretty much preformed and Fourn's was made from scraps. The object protruding from Fourn's wing is a launching aid. I checked the plans twice but couldn't find a landing aid ;-)