Faith - I second the opinion of you did an excellent job on the cleats.
on the WoodenBoat forum, people that have wooden boats, use wood cleats.
reading some of the info on them, you build them to accept 3/8 - 1" line.
and the fasteners (stainless steel bolts) must be twice the breaking or shear
strength than the line. so it takes some research in the whole project to make
it safe for you and your boat. but, bottom line is, people use wooden cleats all the time.
proper grain orientation is the most important part of the wood itself.
and must also support a 250 pound person stepping on the horn and breaking it off.
the same information is available for wooden hand rails that go along the cabin.
looking forward to following more of your journey in your boat build.
is a great source for boat related concerns and issues.