Over the last two days, decide the 1st form is not quite right, and use it to cut another out of thicker material so I can curve the edges to meed the top better. To meet the baffling I hot glue a mixing stick stabilised with a glue block flush with the baffling, then remove the form from the engine, build up a form around the mixing sticks, then remove the mixing stick and the stabilising block.
Cover the result with box tape, glue it to the bench and layup 3 x UND 90/45, with 1 x UND crossways between the plies.