"Chuck" wrote in message
link.net...
But my question is, if we want to make our own instead of buying them, do
we
need to get an STC?

Subject to confirmation, I believe there is a loophole in the FAR's that let
the owner/operator of a certified aircraft make parts for that aircraft.
However, those parts must be installed by an A&P and suitable logbook
entries made.

Bill Daniels
(Happy to own a glider with an experimental certificate of airworthiness)