I have been flying single stick transmitters with the twisting rudder knob for 30 years. When I learned how to fly all the top pattern pilots flew single stick. The demise of single sticks has been stated to be economics of the manufacturers. Through the years many two stick pilots have tried my single stick set up and contrary to the posts above, no one has had a problem adjusting to it after several minuts. I am not talking about precision maneuvers but competently flying. It is much harder to go from flying single stick to two stick. If someone would manufacture a new 6 ch single stick system I would be will to pay double the going rate of the two stick system. A those of us who have flown for years with single stick are running out of options as the older systems are becoming to old.