I am gonna touch on this since a buddy helped me and can add pictures later if you would like. This is just our way, well my buddy hates filler and thinks the less the better
, so we cut the top of the sail area off and fabbed a new piece to fit better quarter and roof out of 18 gauge metal, put about 14 slices in it to shape it and tacked one conrner and worked the metal all way down till was finished, then cleaned up with green rough 3m sand paper wheels and it looks great with very minimal filler need and should be stronger. This was our approach with each person doing it different ways. Brandon