Regs aside, this is something you might run past your DAR/inspector. For example, my FSDO inspector insisted on a whiskey compass even though I was “legal” by reg with my EFIS’s magnetometer. I wanted my AWC so I temporarily installed it a compass to pass inspection. Even though you’re in the right, some battles simply aren’t worth fighting.
This is the best real world answer ever given on the subject.
The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.