Rudder

Seems to have come out just fine.

Removing the ply bits from the foam side forms and ends.

Removing the foam, then the absorber cloth and peel ply. I found equivalent material at the fabric store- t-shirt material for the absorber and nylon sport fabric for the peel ply, half price and they work just fine.

And here is the raw blade, tipping the scale at 3.25 pounds. It's straight, pretty fair, with a slight texture. Still to go is cutting the ends to shape, including the notch for the transom inset and shaping the bottom end, adding some compression plugs where the tiller will attach, then some thickened epoxy coats to sand and fair, and then add the gudgeons. And paint...

Overall, pretty happy with the result.

Cost summary, for those interested:

Foam- $85 (incl. shipping)

3yd 9oz x 24" wide carbon uni: $70

2yd 6oz x 50" carbon cloth: $60

10' of 3" x 9oz carbon uni tape: $11

Absorber cloth and peel ply: about $3

Epoxy and filler: guessing 1.5 pounds, say $20 ?

Scrap ply and 1x4