Last Friday, I took sent DXF files of the cam and the crank arm to a local firm that has a water-jet cutter. Today I got them back and they look fantastic. It cost me about $50 to do, but it saved me a lot of time I otherwise would have had to spend to make the parts by hand. The holes needed a bit of reaming and one of them needed to be threaded, but other than that, there was little I had to do to them.
Charles Baetsen holds a Bachelor and a Master's degree in Engineering Physics from McMaster University in Hamilton, Canada.