I started down the path of using the board as a plug and then stopped.

Whats the parting fence made of? Glass? Do you have to flip the plug and move the fence over the width of the fence to make the other side?

Bill

I just take the parting fence off and then flip the Plug ( A-cat Plug in my case) and the half mold over and support them. I don't separate the plug from the mold untill the second half mold is made.
Nice plug/mold Jake, is that a 1 meter RC boat?

Seriously, Bvining, do you have any photos?

Real nice, Jake. Is that the result of the project in the previous pics?

I made a mold of my daggerboards, I thought I would share how I made the mold.

I took two 1/2 pieces of ply wood and cut out the rough shape of the foil. I then smeared them with thickend epoxy and stuck the foil in between so the 1/2 inch edge of the ply was touching the board. Once they hardened I had a pretty good copy of the foil shape, in two half parts. I then cut 100 MDF pieces the same size as them ply wood and ran them all throught my router table with the original plywood template as the template for my router bit with a pattern making bit on it (ball bearing on the bottom.) I made a simple jig to make this go faster.

I then stacked all the mdf on end and glued them together on a larger piece of ply. Sand lightly, paint with gloss paint.

I'll post pics later.

So, Jake if you don''t mind me asking what was your layup schedule? Did you use 3K carbon or glass, and did you use a core.
I don't want to turn this into a RC thread, but the technology you used can be applied to Cat (or any boat) parts making.