I've made the boxes for the rear beam.
Went a bit heavier than Geoff suggested. They're 5 layers of 4 oz all the way across plus 2 more layers of 6 oz 3 in wide at each end.
The deck curve is drawn out on the beam, which has been covered in packing tape. When they set I can trim them up. The deck flanges will be added later.
Also started on the spinnaker bridle subdeck.
As shown in the photos, I made a template out of cardboard, then cut the 3mm ply.