The plenum mold I purchased was made on the old non-pink cowling and made the inlets too narrow to work on my cowling. I cut off the ears and made a little mold with some stiff paper covered in packing tape. The paper is attached to the other side (which is the top side) of the plenum mold with double-sided carpet tape. I used four layers of 9 ounce cloth. The dark lines along the edge of the mold and along the apex of the curve are epoxy/flox fillets to allow the glass to drape smoothly down onto the paper and to provide a hard corner along the apex of the curve.