Forgive my obvious ignorance about these things, but I thought that certified airplanes had to have the certificated parts installed? And wouldn't the AME have to use approved parts? I am old school and would love to be able to do what I want, but I am not really interested in an experimental. So I am stuck with doing what the mechanic says is "law" :-(
I'm not sure what the rules in Canada but here in the US, the feds do allow for "owner produced parts". Thank Charles for the link:
http://150cessna.tripod.com/parts.html