I think my Klockwerks is a 16". Used it awhile but found buffeting around the back of my head & shoulders. I drilled it & to raise it & that didn't help, then tried one on those "spoilers" deals on the upper part of the recurve, nothing seemed to help. I went back the "wind bender" from fire creek. Fire Creek are great to deal with, great customer support.
Want to try it? $25 plus the shipping cost & it's yours. There's 4 small holes in the recurve & a extra mounting holes for height change. PM me if you're want it.