We have all the component bits to make rotary controllers happen for Tempest 3000 for those who are interested. I wanted to hold off letting anyone know until we had tested the components so there isn't any vaporware. Eltoozero has a working prototype and is putting together a design that is a bit more flexible which should be done by the end of the year. If anyone's interested, we would like you to sit tight and be patient. We feel its a good idea to have people who might be interested in one to know the time frame.