I like the idea of CNC machinery, but since I only do singular jobs and not repetitive cuts, I have stuck with the manual machines. I guess I could have at one point, since I designed a little holder for my vette to hold the relocated MAP sensor in place on an aftermarket intake manifold. I sent pics to a company and they offered to have me make a bunch for them, but I declined. Manually it would have taken me more time to make them than I could reasonably charge for the end products.
But not too long ago I found that someone has run with my idea and are now making these things for that same company.