Again, the gist seems to be that owner made parts have to be based on
approved data of some kind. The owner can't just roll his own, no matter
how much better it is, without a field approval.


Yup...there is the key. And by regs, the installing mechanic is responsible
for assuring this to be so.

And Jim, I'll be back this weekend when I have more time.....with my "smelly"
opinion