Batch box rocket ovens

I quickly tried to search the forum for this but the only thing I found was a topid about an external big build by someone so I'm both asking and, if the answer is no, proposing to wheaton labs to further investigate this:

Portable batch box rocket ovens. (white ovens)
And indoor batch box rocke ovens (white ovens)

Has anyone tried to build one? Which configuration did you use or would use? Which materials? Which riser dimension?
How does it compare to a J-tube portable rocket oven?

I think the major advantage rom the J tube would be the quicker burn and thus a shorter time to reach desired temperature but at the same time if you have something that need to be cooked or baked for a longer time at a quite stable temperature, this could maybe be more problematic to achive.

A batch box is definitely going to be harder (if not impossible) to modulate the oven temperature. When filled, or even half filled, it is going to burn at its designed rate and that is it. You could probably add some kind of adjustable bypass so that the gases surrounding the oven were somewhat cooler than the pure batch box exhaust...

a bypass on such a small structure seems a bit awkard to me, I was wondering about some sort of simple strategy to dynamically change the height of the exit flue so to regulate temperature by regulating the gases temperature.
A rotatory plate with the hole leading to exaust chamber for example.
This would be feaseble for a portable oven I'm sure, but I don't have enough foresight to imagine how this would infulence the whole system apart from a probable uneven temperature in the back side of the oven