Mike Vacanti

Topside paint is not waterproof, it is normal for it to bubble or lift if soaked in water for a week.

What type of plywood to use for small boat construction is a source of never ending debate in internet discussions. Personally, I wouldn't build a boat with anything other than name brand marine plywood. Joubert and Brynzeel are 2 very good manufacturers. I know that some low quality far eastern manufacturers stamp their plywood with 1088 but it's really meaningless. The reputation of the manufacturer is the important thing.

There is really only 3 things that could cause the epoxy to not harden. 1. The temperature is too low. 2. The resin-hardener ratio was incorrect. How did you measure the resin and hardener? 3. The epoxy is defective. This seems the least likely culprit.

What a good looking boat, thanks for posting. More pictures would be welcome.

A single layer of glass is no where near 1/16", here is a handy table from the WEST Systems epoxy folks, laminate thickness

It looks like there is no fiberglass sheathing on that rudder.

Pete, I noticed that the weight of the boat with all gear but no crew is 1350 ponds. Did you actually put the boat on a scale to get this number? Thanks for publishing your owners manual, it was interesting to read.

It's also possible that you didn't thin the primer enough.

Todd, Holy cow, thanks for sharing your harrowing story.

Here is a video that shows one way to do this. This channel has a lot of interesting boatbuilding videos. Mark a waterline on a dinghy

On the CS 20 page there is descriptive text but the pictures being referred to don't show up.

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There is a German company that markets an auto-inflating masthead float that might keep the boat from turtling. It's not cheap but it would greatly reduce the windage compared to a solid float, auto-inflating masthead float

Peter mentioned a breakaway cleat, here is a great example available through Duckworks

Here is a description of a poor man's CNC: DIY NACA foils