Originally Posted by Reaver
you will need some kind of venting under you kettles so the heat and combustion can escape from the burner ring.
+1. you could cut some piece (like semi-circles) out of the tops of the rings/wind-guards.
if the pot makes a perfect seal over the rings, flames won't travel up to the pot. in fact without upper ventilation, the O2 in that trapped space will be quickly consumer and the burner might not burn at all (or at least very inefficiently).