After I mowed the lawn, I had time to cut the legs of my new bench today. I screwed a piece of 2by4 to the end of a face of a piece of old plywood (resting on saw horses) and put the factory ends of my four 4' pieces of 4by4 up against it. I clamped the 4by4s together with pipe clamps for good measure, and clamped a piece of 2by8 accoss the top, with F-clamps, to use for a fence for my circular saw. I was going to make the cut, when I thought this would make a good picture for you guys! ; ) So I took a quick pic, and made the 2" deep cut. Then I thought, now what? I cut the rest of the way through with a hand saw (a Menards freebee). The 2" deep cut worked like an old miter saw, and the cuts game out excellent I think--exceeding my expectations. Of course, there's flat, and then there's flat (like you strive to get with a shooting board). I'm assuming the former is flat enough (please correct me if I'm mistaken).
Regarding glue. One wouldn't want to glue the boards making-up the workbench top to the "frame" would one? It seems like with screws only, one always have the opportunity to easily put on a new top. And that is a valuable option.
Just having cut the legs--to size, I feel like I'm "over the hump". But dinner was called... Tomorrow, tomorrow... : )