Hi, I'm just finishing up my guillemot and have decided to build the bulkhead-type foot brace in Nick's book ( I just can't bear the thought of drilling more holes in the hull ) . My problem is that the angle is not given for the plywood support piece, the back of it is cut with a 5" radius and all the other dimensions are given but how far back to angle the double beveled edge is not. Has anyone made this and if so what angle did you use and was it comfortable? thanks. Kenny