longinthetooth":1geysyqn said:
Second one - 4 legs in all. More than strong enough, simpler, cheaper .... top overhangs are also handy for clamping things ... where's the vice to go?
And the converse- top flush to the front enables long boards to be clamped to the front edge. Horses for courses, and there is no right or wrong answer- you need to think which you are likely to require most. A sheet of something will allow you to clamp to it on a flush top, and there are many alternative ides for clamping a long board onto an overhanging top.
Depending on what you want to achieve- something purely functional, cheap as possible, or a beautiful project in itself, i would be tempted to slightly change your design slightly. If your aim is cheap as possible, quick as possible etc, I would laminate up the legs from 2 pieces of the stretcher/rail material, leaving spaces for the stretchers. Then run those straight across the legs (more like aprons but not as deep)- glue and screw.
At least you have a current bench, so you have some knowledge of what you want in the next model. Dont be tempted to make it too wide. Mine is IIRC 21 inches, and I have moved it out from the wall about 5 inches, so that i can run a router flattening jig runner along the wall. For working, I find it spot on. For assembly of large items, it could do with being a bit wider, but that said, if it was any wider i would struggle to reach the far side easily.