Thanks Howard, I will experiment.
For those that like the design phase, I can recommend two cheap CAD products, DevFus and DevWing. Each product walks you through the design parameters of a wing or fuselage and let us see in 3D the impact of your design choices. When you have finished they can export to a CAD package for final tweaking or straght to DXF for feeding into a laser cutter. And you can try for free, but with the print and export functions disabled.
Jonathan