Thanks for the info Paul. The sketch-up is a big help. I understand your reasoning for using plywood, but I don’t think I could cut it as accurately as would be required. I don’t have a band saw, and a recent music stand build gives me pause to try to use the jig saw for anything that requires accuracy. A solid hardwood top will be easier for me (and with the cost of plywood locally, hardwood is 1/3 the cost).
As to the beam joint, I was afraid you would say band saw. I really need to buy one, but I haven’t found the right one for the right price yet. I think I could make the cuts with a pull saw though.
I’ll be using hard maple for the vices. It has the hardness and durability needed, but without the hassle that comes with working with hickory.
This will be a long, drawn out build. I’ll start with the wagon vices so I’ll have some dimensions to work with when the top goes together.
Who knows, maybe I’ll find a band saw in time to make a plywood top.

Where are the band-aids?---Pro Libertate!