Larry:
Installation for both units seem to be a snap: power leads and pitot/static plumbing are the only connection (in one the magnetometer is external, so that's one more connection). The reason for such few connections is that most everything is inside the housing. So the real issue is fitting the box in your panel and the 337 approval (or some clever way under the panel in a non-permanent way, without connections to the bus, so you can argue that it's like a hand-held GPS). I like the approval route better, and would like to think that you can find a sensible and courageous FAA guy who'll sign it.
Ernie
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