The benches shown are BR Pivots, made by my crew from 1997 till 2007 when at that time I sold the patent and manufacturing rights to Battenfield Technologies (Midwayusa). They are offered in all-steel only now under the Caldwell label. DOA came later and 'borrowed' from my original design.
The Caldwell Stable Table? Your original design looks WAY more sturdy and stable. If the bench isn't rock solid stable, it's useless. I haven't tried a Caldwell Stable Table, the price looks too low for the stability I want.