The Sig 4 Star is reportedly weak at the wing saddle, so I added some reinforcement.



To add the Turtle Deck Sheeting (I used 1/16" balsa) I simply followed the build manual but then sanded the Formers down by 1/16" at the point they met the fuselage side. I also used some scrap balsa, glued 1/16" in from the fuselage side, to give an edge that I could glue the sheeting to.



The Sheeting was made from some 1/16" balsa sheet, glued together, and then cut oversize for the Turtle Deck area. It was thoroughly damped down and formed over the Turtle Deck until it could be held in place by elastic bands.



I then marked and cut one side, taped it securely in place, tightly wrapped the sheet over the Formers and marked the opposite side. Cutting this final side left me with Deck Sheeting that fitted perfectly side to side but was slightly over length. I then CA'd it down one side, from cockpit to tail, before stretching it over the formers and gluing it to the front and rear formers as I went (I did not glue it to the intermediate formers so it could form a more natural curve). Finally I glued it along the opposite side. A sharp knife removed the excess balsa from the two ends.