I found it hard to find a replacement wooden post cap, and the old wooden ones were rotting too easily. This one replaces both the flat cap piece and the ball that goes on top as one piece.

Print time is quite long, but course settings can be used. The only issue I found is that removing from build-plate can be hard - maybe a raft might be an idea if you are not setup for easy removal.

Used 2 #8 screws - ensure they are exterior grade.