I schach build I buy plans and kind of follow them but I am not usualy fussy about folowing the details. This time I wanted to make them as authenitic as I could. Years ago some one gave me a fuselage, one leading edge, bellcrank mount and the tail from a crashed Sterling Ringmaster kit. So when I started out I was woryed about the leading edge. What I did I had a peace of galveniez steel I think from a washing machine. I traced the shape on about a 2''X3" piece and used a Dermal with a Carbide ber to cut it out. I fasened it to a stick thinking I could drag it over the balsa and eventualy shap the edge. On the table saw I cut the dementions for hight and thickness and beveled the front edges. I descovered that my plan to drag the shape wouldn't work. So I would drag the template and use the Master air screw razer plane to take a little off at a time. I was surprized at how fast it went. Each one of the 4 peaces only took about an hour each to shape. The ribs I used tracing paper and french curves to trace the plan. I have a Kodak 3 in 1 printer copyer. I needed 4 of each rib so I ran them through the copyer. I got some Bordon reposision glue kind of like sticky note and temproley atached the paterns to the balsa. I used a plastic cutting board to hold the parts down and cut through the balsa into the plastic with the Exacto.I turned out all the ribs in three evenings.