Is it true you can install a Dynon EFIS permanently in the panel by simply marking it "reference only?" I find that kind of hard to believe. If something's permanently connected to the bus, I'm pretty sure you're going to have to get an approval (at least a 337, if not a DER report).
If you want to use this EFIS, I think you're going to have to make it a "portable" installation to keep it legal. An avionics shop should be able to answer this question easily (vs. my guess).
Richard, were you successful in getting the FAA to approve this?
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