Yep, I can control my VTOL model from the joystick in X-Plane, but controlling it via HIL doesn't work. I have a HIL config file for it that I just based off the regular config file--do I have to change anything beyond adding "@type Simulation" and "set HIL yes"? I can load this airframe on the Pixhawk and connect it up to my X-Plane model, but the differential thrust controls don't really work and of course I haven't figured out how to map the "tilt" function.
As for the airframe - all four motors tilt, so it has differential thrust until mid-way through the transition, then the motors respond only to throttle. It has standard elevator, ailerons and rudder.