Workbench 2.0 was finished tonight. There is a big difference in the sturdiness and look from the old workbench. Overall the height of the new bench is better ( slightly lower ).
The bench is also much flatter, as confirmed with the level ( made from 6061-T6! ).
Underneath the spars and skins can be kept safe, so we even gained additional room in the garage.
It only took two of us, an hour, a plywood plank and some cinder blocks to lift the frame onto the new base. Shimming, leveling, and attaching the table top took a few more hours.
Here is the first iteration of the old bench, followed by the second iteration: