Plans: 1. Add space to the radio mount for a Trig transponder/ADS-B control head. Status: 50% complete. I have decided the best location to add the control head for Trig's combined transponder/ADS-B would be above the radio. Unfortunately that requires the construction of a new mount that accepts both units. I completed the basic mount and stained it to match the instrument panel. A coat of polyurethane still needs to be applied before I can assemble the radio components. At the moment I don't have the Trig system.