Lawrence, I am glad to build any new design for you. I have find a 'dxf files for autocad' software and try it later. >Can you handle 42 gauge wire in your winders? Yes,the winder can handle up to AWG48 copper wire. The sample coil I sent to you at last time. It is used AWG40 (0.08m). Best Regards, Frankie P.S I am building a automatic bread maker. It is so interesting when the bread is make.