On to the apron ends. I wanted these to fit tight to the ends of the bench, but I won't be applying glue to them so I can separate the slab when I move it. So I decided to use the same principal of the cauls described above to keep the middle of the end pieces tight against the end grain.

Started by dividing the board into five sections. Then ran it through the jointer set to 1/32nd passes. First pass took the first two sections on the ends of each board, last pass took the outer sections a second time.





Cleaned up the transitions with a hand plane:


Here you can see it up against the end grain. The left side is flush, showing how gentle the curve is to the right side.


With both ends clamped flush, pressure is put on the middle to hold it tight to the ends of the slab.


Cut some walnut dowel pegs and rounded the edges off with sand-paper. Also hit them with some wax to keep them from seizing.


Then marked my ends and clamped a drill guide to ensure my peg holes were straight and true:



This is about as good as I could reasonably expect for a tight fit, and I am happy with it: