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
When I wrote a reply to your thread right above the box where I typed my response there are several editing buttons. One of them controls strike-through. Simply select the text that you inadvertently enabled strike-through and then click the strike-through button.
Edited: I tried to go back and edit my post and I notice that the strike-through button is not available when editing an exisiting post.
I stand corrected, I saw a picture on the Ronstan website that showed a lashing through the center and I incorrectly assumed that was the only way to rig the block. I too much prefer lashings, they are much quieter than shackles.
I'm pretty sure it's not blush that causes the issue. I scrupulously cleaned the cured epoxy before applying the primer but it still never dried. I've read explanations for the problem but can't explain it myself.
I have run into this issue on a build many years ago. I used a one-part primer (West Marine store brand) over WEST epoxy and it never cured. I ended up sanding all the primer off and then applied Interlux 404/414 2-part epoxy primer (now called Epoxy Primekote). The Primekote cured just fine and sanded very nicely. I thought it was a reasonably high-build primer. The Primekote is also very tough. If I were painting a new build I'd certainly use the Primekote. One warning, the fumes from the Primekote are pretty noxious. Be sure to use a good organic respirator.
I'm not familiar with Devthane so I'm not sure if it has the same handling requirements as other types of 2-part linear polyurethane paints (LPU). I do know that it is not recommended to spray 2-part LPU unless the operator has a forced air respirator. A regular respirator is inadequate.
Perhaps you could upload the video to YouTube? I'm sure many here would love to see it. Thanks and congratulations on your successful build and launch.
Alan posted a YouTube video and he explained that the mast failed due to severe corrosion. It looks like water was held against the mast at the point where the reinforcement ended. Here is the video: Mast failure
I've noticed that a few folks have posted Graham's speed but I don't see a way to get speed info from his Spot page. Can anyone tell me an easy way to get the Spot tracking page to display speed? Thanks.