I use drafting Vellum paper to trace (carefully) and kit part not shown on a plan I happen to use. You'd be surprised at the times a tracing can come in handy. When it comes time to use the pattern just lay it on the balsa or ply (you can see through it to locate the pattern to the best advantage on the wood) and, using a T-Pin, poke holes around the pattern lines into the wood and when finished cut out the part. The Vellum patterns can be stored in a folder and do not take up much room in the shop.