There are several articles lately about installing the Air Gizmos mount.
Mike Busch has been one of the most vocal. According to him and
others this mount is the very definition of a minor alteration.



Mike Noel wrote:
I don't think this discussion was about panel mounting portable avionics,
but I thought I would share what 'Dave' the avionics guy at our airport told
me. I want to remove my old clunker ADF from the copilot side and install
an airgizmo mount with the 15 degree angle adapter. He thinks since the
hole will already be there from removing the ADF, the only paperwork
necessary is updating the maintenance logs and the weight-and-balance
information.

Hope he's right.