Worked through the Dynon Comm radio to radio-panel harness, and the radio to intercom harness. Used test power leads and powered up with headset, but had to fabricate an antenna coax first.
Quick tune-up in the garage, too much interference, and almost no traffic at this late night quick test. Will have to review all and work through test after work Wed.
Decided to get a professional quote from Stein before deciding to stick with DIY harnesses. This is the MOST complex of all the systems wiring. Everything else is more basic pt-to-pt, and no-shielding. Many grounds and multi-point connections, but good to understand these systems.