The struts are cut to length, and angle. The spar support bracket is glued to the curved beam and I have epoxied bigger backing pads to the outside of the coaming to stiffen the whole thing up. I haven't matched the angle between the top of the struts and the cross beam as closely as I had hoped, so I am gluing on some wedges to give a firm base to screw the struts through. I still need to cut the beam to its final length and I may glue on a mahogany end trim. The beam will be painted ivory to match the cockpit.
The further plan is to run wires up through the struts to navigation lights at each end of the beam. I have seen some nice LED ones which would fit on neatly and only draw 1W or less. There will be easy access to the mizzen and no obstruction to lounging on the side decks. And as planned, I can take it all off by just unscrewing it if I don't like it.