Craig,
Upscale marina there! Looks like you're tied up to a putting green!
Like that stealth bimini too!
Once saw an interesting way to waterproof deck holes.
You mount a chain pipe* fitting onto a wood pad that has a groove all round its side so a canvas cap can be lashed over the thing. Like a winch cover.
Another idea for rough weather is to remove the cowl and replace it with an aluminum disk. Don't know if that would work with the ole cowl you have.
But you are in Florida
and there must be others here in the bleacher seats who would like to know
how you reduce damp and mold in the forepeak. Is the old cowl enough?
Won't rain get in?
__________________________________________________ __________________________________________________ __________________
* why is a traditional curved bronze chainpipe fitting not designed with a gasketed screw on cover?
It's not as if the pipe has to be instantly available at all times for the anchor chain, right?
The center of the cap could have a loose hook through it - that could take a chain link - so it would be right there for the anchor when the cap is unscrewed.
As it is, it is instantly available to take water below. The bonnet idea seems doable.