Hi Jacques!
He has added it too after the initial analysis though?
As for the U section bolted between the springs upper cups, I would be wary about using a bigger one. It can't be worse in rigidity, but is it any useful, I don't know.
Generally speaking, a lot of people are very happy with their "uprated" things just because it's bigger. Uprated ARB (aka stiffer), stiffer springs, harder shocks, and so on. But often it's not based on anything proven. I mean, some people install stiffeners bars between the M100 rear upper spring cups in the boot. Some basic knowledge about the M100 chassis structure is enough to assume it's totally pointless.
So, as for the bigger U bar in the Esprit, I certainly would not trust anyone pretending it's useful without a serious analysis like the youtube video guy "Jon Himself" has made.