Hi everyone, I have more advice for designers. Flying with my plane, I also found the NATO Boeing Sentry in traffic several times, but the CAEW of Italy and the Israeli one are still missing. This is a modified Gulfstream G550, I am attaching several photos.
No one at the moment is going to do this complex models because of few aircraft flying around except he/she is really into it. Blender is a freeware program with plenty of tutorials online. Sound like a good start.