Just one day out here and it's a mess already.
I gave the benches an extra 3.5". If you zoom, you might be able to see that I routed the tops of the 4x4s to make them pretty.
I also sunk leveling feet in the front of the forward facing bench because the garage floor starts to grade away there. I put the sjobergs vise in the corner, clamped the benches together underneath and started making sawdust.
The tangle of clamps are on a mailbox I'm making.