Its not the first time that aircraft would have different fits. Even though individual NPAS units specced their own aircraft, I doubt that there is that much difference between them. With the 135, the avionics fits differ A LOT, whenever I fly another units aircraft I use some of my travel day to sit in it and see what systems are on board. Twin inverters, T2/2+/2+e, GNS430, std radio, transponder, nav fit/GPS, lights, station box, radar, chelton/handheld, which tac channel, MRT radio. As we all know PPPPPP