My Dragonfly canopy installed is 17.5" above the longeron at the tallest point, which is pretty close to what the side views of the KR2S show (the only point of reference I was able to find at the time).
Mark Langford, Huntsville, AL N56ML at hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford
