I’m using Working Title mod for CJ4 all the time. I have to admit that the FMS coming with CJ4 is not as easy as others(e.g., G1000, G3000). That’s exactly why I want the Citation Longitude, which comes with G3000. But I still like CJ4, because it’s lighter and more agile than huge jets(A320, Boeing 747), and much faster than propeller aircraft.