When I switched to dual stick 4 years ago after flying single stick for 35 years, there were two things I did not like. First, with single stick you have the tx on solid footing in one stable position since it is held in the crook of the left arm. Second, with single stick it is natural to hold the stick with thumb and fore finger - thumbs only just doesn't work. Therefore it just seemed natural to use a tray with dual stick. And I must say, it has worked out very well.

Bruce