Jim Burns wrote:

I spent some time with an A&P friend last night and noticed an AirGizmo on
his desk. I relayed Jay's story and he said that after dozens of phone
calls and non-committal answers he was finally able to confirm that the
Milwaukee FSDO is ok with a log book entry but Minneapolis was sticking to a
field approval.

That is not FSDO's call to make. The mechanic is the one who decides
whether or not any particular alteration is minor or major. It is very
clearly spelled out for the mechanics.