Built a swing down radio tray for the right side, the left will have an identical swing down tray. It's made with 1- 1/2" piano hinge and .032 alum sheet. The trays will be held up by screws and nutplates. I am making them 14" long and 8 1/2" wide. The left tray will hold the #2 remote radio and the right will hold the transponder / ADS-B unit. Pics shortly