Rocket stove with a discada?

A buddy sent me a picture of a rig he ordered from someone in Austin back in November he should be getting it "soon".

its a rocket stove set up to mount /transport on a trailer hitch. In addition to a flat grate, it comes with a (looks to be) 22" discada. It is a COOL looking rig.

The question I have is: How do you control the temps on a rocket stove...

What made me question of how good a fit it would be is that most of the videos of rocket stoves I've seen just show them running wide azz open- fire leaping out the top- holy hell hot. This made me wonder if it would be a good choice over a nice propane burner where temp control is just a twist of a nob away.

Most of the ones I've seen are pretty simple- I saw no obvious way of controlling temps except by the amount of wood you put in the chute. I've never cooked on anything remotely like this and am sort of intrigued by the idea. I just wondered about the mechanics of stirring and flipping food while keeping that fire stoked just right at the same time. Maybe it's super easy and I'm just overthinking stuff (again)

He will have it delivered in a few weeks- he's a lot more patient than I could be. I've asked for pictures - if he shares, I will too.