Hello Jim and Phil,

In my opinion the PT Gyro Can be made to be very responsive perhaps just as responsive as Mickey's designs if a few changes are made to the PT's.
My own version of the PT25 is extremely responsive and will do a snap roll, loop, barrel roll, and extremely tight spiral. It still won't fly inverted and may never because I'm not that brave or stupid. All a person needs to do is increase the pitch and roll deflection to the rotor head and increase the rudder area and deflection to about 45 degrees. I also moved the rotor pivot point aft about 3/4 inch which required the rotors to be shortened as well. The rotors now rotate faster besause I'm using a 2" blade instead of the 2 3/8" blade.
You're right Jim, the PT was designed as a primary trainer and is perhaps the best trainer on the market in spite of the lack of commercial advertisement by the guys from Tennessee. The PT series can be made more responsive and much more fun with a few changes as I indicated above once a person is confident and experienced with the autogyro and the different way it handels compared to fixed wing trainers.

Joel