I have decided on a Garhauer rigid boom vang RV-20-1. Mark, their fabrication tech, has been very helpful in getting this project done. Taking the attach plate off the mast was little bit of a chore but doable. Boom will have a new attach point and the old rope vang attach point will be left as a preventer attach point. Garhauer custom makes the mast and boom attach plates. v/r Dan #409