I use a 2008 50cm bar on my Rise 6,8,12 rise. (or is it rises?)I do have a 40cm which I have used with my 6mt. All seem to work well. Does anyone have the numbers on reaction changes on the OR kites compared with different bar sizing. What is the science on different bar sizes? Does it all come down to how quick you can deflect the bar from max port deflection to max strbd deflection?