Nice job, Bob!
You are correct….the wood will usually break before the epoxy does, but I was thinking that a few stout screws would add to the shear strength should the skeg be subject to such a force (which you have now done).
Are you going to paint or varnish the interior? If painting, the filled screw heads will disappear nicely. If varnishing, you might think of counter boring, sinking the screws, and filling with wood plugs. I have used blonde plugs on mahogany and it comes out quite nicely.
Good photos and captions, Bob!