Hi Mr.Punter
This is a old Gas Tandoor Oven and it came with a big burner, pipe assembly (on/off) and the
heavy gauge vented ( full of holes) baffle plate.
I stripped all this out and kept it aside, while I refurbed the pot.
I used the baffle plate to hold all the charcoal to emulate it sitting high on top of the original burner
To raise it off the bottom of the pot and get an air flow underneath the baffle,
I used three terracotta plant pot feet (simple)
It acts like a medieval brazier, 100% oxygen to the coals/fire.
I might get a couple of fire bricks to get the baffle a few inches higher up in the pot to mimic the
position of the original gas burner.
At the end of the session, your left with 100% fine white ash.
Cleaning up, I simply lift out the baffle plate, tip the ash into a waste bag and replace the baffle plate. All very efficient ;D ;D
I hope this all makes sense

cheers Chewy