Nacra wings slip into the end of the beams and they may work but on an F17 I believe you would still have to make modifications like drilling a larger diameter hole in the cap casting but I still don't know if this would work because I have no experience with Nacra wings. But I do know that if you drill out these holes to accept wings you will also be making your boat NON class legal which may not bother you but will definately hurt your re-sale value.