A professional builder would have incorporated the stern tube in the keel structure. However, I was in exploratory mode, not knowing what engine I would have or what size propeller shaft I would need. So I bored it retro ...
There, the deed is done - a veritable owl's nest.
We check the fit and then fair in a surrogate of the stern tube without bonding it in yet.
Wax paper is our friend. Even so, after fairing, I had to whack the surrogate out with a mallet. Epoxy is a fearful thing.