Cutting board rehab and replacement

A friend asked me if I could "help him with a cutting board problem." I wasn't sure what this meant, but he brought me five pieces of a cutting board. His wife had run it through the dishwasher and the glue came apart. Pictures 2, 4, and 6 are the old cutting board. It's oak, and serviceable enough, but I figured they could use an upgrade, so after re-gluing, planing it smooth, and refinishing the old board (with metal-free BLO), I started working on a new cutting board using some hickory and butternut that I had in the shop, roughly basing he board on this one from Pop Woodworking. I tongue and grooved the three boards together, then got it to the right thickness (removed almost 1/4" of hickory with a scrub plane), cut tenons using a rabbet plane, and mortises using my combination plane, cut a finger groove with a moulding plane, pegged on the breadboard ends, and finished that with linseed oil.

I tested using white pore-filler on the back of the hickory, but didn't have the time to prep the surface as well as I should have, so scratch that idea. But the hickory and butternut look pretty good now, and should look even better as they age.