I recently bought a Caldera Cone with a Ti Pot and also got the simmer ring.
To use it you just boil your water first, then lift the pot and cone
off the stove and just slip the Simmer Ring over the stove. It slides
down to cut down on the air flow through the stove and lowers the flame. The Trail Designs Simmer Ring has a slight taper and the smaller diameter goes up. Of course once it is in place you can't just pick it up and move it. It gets HOT ! But once it's in place it
cuts the flame down considerably. Never timed it though.
Larry S

