I have that exact table you pictured. I would buy it again if this one died. They are a huge help. We only use it for the larger backpanels. 72*72 can be laid out on it horizontal flipped vertical for wiring. We will pick the sub pan up with a forklift and drop it into the enclosure. We don't have to man handle an enclosure with 15 VFD on it anymore.
I have started drawing a 8020 version but stopped after figuring my man hours to design, build, and assemble it.