Have a very nice Cherokee 180 and rather than spend money on a replacement airplane I decided to completely upgrade the panel. Want it to be capable over the next decade or so without needed further mods. Installed EI engine analyzer, USB ports, Aspen 2000 ,Garmin. GPS Century 2000' and NavCom with new Xponder and audio panel. hidden are the Garmin ADS-B, Aspen digital converter and MFD battery. Had my 720 mounted, don't want to be without it. I realize a huge learning curve is ahead, but hopefully some time next week it will be back in my hanger.