The mold for the beam tops is made from the 2 cut-off from the beam mold itself. i.e the opoosite curve
I thought I would vacuum bag these as it only needs a small alteration to the mold to give a flat surface.
The mold is just made from slats running from side to side. I added this piece of 6mm ply to give a surface to bag on.
To hold it in place a few right-angled brackets were needed around the curve. Otherwise the slats were pulled out of the chipboard sides.
Positioning the foam. The black tape is covering another removable strip, which will be dug out from the otherside later on. (Same as in the beam bottom.) The slits for the strip should be completely sealed with putty before laminating. The gap at the front is where the top goes over the reccess mold. The smaller rectangle higher up is where the highest part of the UFSR will go.