the designer who has done a nice MU2 for X-Plane, decided to take the basic RV in X-Plane and give the grey skin a re-do. He also worked on the flight dynamics. Actually several versions were made, but everything has not been totally perfected yet. A flight instructor also made some modifications to the flight dynamics, but I have not tried them.
This plane looks suspiciously like mine.
The first version even had the tail number.