buy some thick copper wire
pound it flat with a hammer
wrapit tightly around the canister about 5 times and have the end flare over so it sits in the burner. It should look like a big ol' cobra wrapped around the stove and ready to strike the burner. if its not wrapped tightly it will slide off the canister*.
don't wrap it underneath or your heat exchanger will burn a hole in your stove board. maybe it's OK in a hangoing stove.
the wraps make it hard to grab your stove until it cools down.
for less efficiency (full cannister) use less wraps
for more efficiency (almost empty cannister) use more wraps
practice in backyard so your exchanger doesnt blow up your stove leaving you stoveles halfway up the Nordwand of der Gross Shmeeb.
* you can put a wrap around one or two of the pot rests on the burner, just below the cobra head part, to stop the slide off effect