I just wanted to comment on CW or CCW rotation of the blades. I am using molded fiberglass blades for the comparison tests mounted on a converted single rotor SIG Senior Kadet . My first comparison test was performed on a gusty windy day and the blades that turn CW, (as viewed from the top) seem to perform better. I did more testing on a calm day and the direction of rotor rotation didn't seem to make any difference. However, each time I switched rotor direction, I did have to change both the rudder and head tilt trims slightly to make the gyro fly straight and level.

Phil