I managed to get all the joinery and tuning done on Friday, making this project complete. Here is the complete “Breakdown Bench”.
It’s pretty solid, given how tight some of the joinery came out. It still comes apart, though. I need to sand some of these pieces a bit, and maybe add some sealer, but otherwise, it’s done.
I wound up cutting the mortises on the benchtop pieces by drilling through and then cutting with a jig saw. This gave me the basic through- holes, then I tuned them with a rasp and a file.