[Veselin Kolev]

if you do end up machining your axles out of 1/2" hex, machine it as little as possible. it is very difficult to cut a long, precise diameter in steel hex. One of the transmissions I did earlier required a 3" long section of 1/2" hex cut down to round, it took quite a while to get the lathe cutting it to proper tolerance the whole length. Although our tolerance was pretty tight... its still a pain. keep it simple.