I ran a NE 6.0 chute on my 18 Magnum (once). Ran it masthead (all-aluminum mast) with a 13' pole; sheeting to the rear crossbeam. Fit pretty nicely, moved the boat quite well, then I looked up and saw the mast tip deflected at leat 12" to the side... Got it down before anything broke, but that might have been a little bit too much chute.