I made a P3 type python based on Jurgen's great tutorial on the python project site and have posted pictures and data in the python wiki<http://en.openbike.org/wiki/Main_Page>. No CAD drawings, mostly a ruler, a level, and a welder...and a hack saw. The bike is made from my old commuter bike, a nice steel frame with terrible proportions. I am using a bottom bracket as on the P3 for the pivot but fabricated the bottom "crank arm" from steel tubing since I could not weld the aluminum one after so nicely cutting it and bending (cheap welder!) Overall the project took one summer to build a few hours at a time, probably 20-30 hours in all. So far I am a terrible rider! But I have at least graduated from grass to pavement. I tried and abandoned a steering damper from those pocket bike motorbikes and now have a set of handlebars bolted on, keeps the brakes handy but does not help steer much. Practice! Kurt Kauai -- Kurt Rutter, RN, MSN Kauai Community College Nursing Department krutte@xxxxxxxxxx cell: 631-9131 (\_/) (0.o) (___)o