I used a Hobie 16 boom for the pole and took the boom gooseneck assembly off. I then took a Hobie 18 mast gooseneck and bent the sides in to close it off. I got it so that it would wrap around the dolphin striker and I used two small screws (in the rivet holes) to tighten the sides around the striker pole. That gave me an attachment point and a nice universal for the boom to attach. Pretty slick install.