Right you are, Bruce. Could've swore I had one but nowhere to be found. Anyway I got the buck pretty close to right with the routers, dado and the belt sander.
And with a little MAP heating and watery sponge cooling this evening the metal laid right down on it.
I think my next step is to set up and practice with the bead roller until I can stay on a line, and then buy or make a tipping die to help with that long outside fold. I could do it with the seamer but rolling would probably be much neater.