I am a late career physician, who as a teenager raced bicycles and worked as a mechanic. I have a collection of bicycles, some now are classics and a few newer ones. I recently engaged a custom frame builder to teach me the technics of framebuilding. I am working on two frames currently, designed the old fashion way- on paper with a straightedge. I am soon to design a couple of new project bikes, and I would like to use this software to that end.