Continuing the build, next on the agenda is the wing spars and skins. The wing spar is composed of a series of boxes glued together. The only end piece is at the wing root, so the boxes once glued together are able to twist a little. If I was to build another model, I would probably put some reinforcement around the engine mount area to reinforce it. The instructions show a straight spar, but once glued together they form a Z shaped section. Once the spars were constructed, I decided to add a wood spar through the fuselage to connect with the cardstock spars. The spars are then glued to the fuselage. Since I had not yet joined the fuselage halves together, it was easy to press the spar and fuselage parts together for a strong joint. If the fuselage was joined beforehand, I think it would have created a week point likely to collapse over time. The end of the box spars line up with the end of the front fuselage section. After the wing spar glue joints dried, I fastened the the fuselage sections together.