The only modern gyroplane that appears to completely meet the stability criteria established by Cierva is the Aviomania Genesis.
Perhaps the Austrian Arrow-Copter also conforms since I don’t think Chris Lang would have become involved if it didn’t. But I have no factual knowledge.
Oops! Almost forgot Ron Herron’s LittleWing, holder of most of the FAI records in its class. Ron was very careful to address the propeller thrust/CG issue as well as aerodynamic torque compensation.
**********
Here’s a list of the LW’s FAI records:
http://www.airventuremuseum.org/coll...%20Records.asp