"Further investigation lead me to the
simple 337 route and my IA was good at accomplishing that."

So I'm curious. Unless a 337 is used for a field approval, it is just a documentation of work and inspection form for major repair and/or alteration. It still needs the documentation of the approval to perform said work.

Can you share what was on your 337?
What approved documents or was it a field approval, aproved by your local FSDO?