Frank gets right into it - you even get to see him cast custom pulleys in sand by melting down some aluminum hard drive chassis. Well beyond "quick 'n' dirty" ForkenSwift stuff, but inspiring.
That casting is very cool. It would be neat to try doing that for an adapter plate used on an EV conversion. You would need lots of little scraps of aluminum though.
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Best tank= 81.23 mpg on 07-01-2008
Longest range= 791 miles on 9.74 gallons
that diy sprocket has another benefit, it is difficult to find front and rear sprockets with even number of teeth in a ratio that you want, but if you can (and you "phase" your chain) you can improve chain and sprocket wear characteristics, according to the late great Sheldon Brown anyway: Extending Bicycle Chain and Sprocket Life
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WINDMILLS DO NOT WORK THAT WAY!!!