The manual calls for individual ply jigs for each fin rib . I decided to layout F1 F2 & F3 on the same jig. Ill start with F1 then move my blocking to the F2 layout then F3 ect . This keeps the fin cord plane stationary for all three ribs and is set square with the ply so ribs can be trimmed in the jig squarely to fin cord plane.
