I had an older stove that ran fine at home. My entire tests on burn times and how much fuel was needed to boil water was done with this stove. I ran into problems when I went on vacation 6000 ft higher than I live at. Using the windscreen with the "L"-Stand it ran like a blowtorch. Fuel vaporizes at a lower temperature at higher elevations. I had to make a field adjustment by cutting down the 1/4" fin down to about 1/16" and increase burner hole size just to run at all. I was using fuel at a rate 3 times faster than at home and not heating the pot well because flames were going around the pot.

When I returned home I ran some more tests using 2tsp fuel and this same stove. The stove above alone ran for 5:30 minutes with about 3/4" flame height . Putting it with the "L"-Pot Stand it ran for 3:40 minutes with about a 1" flame height. This is because the stand is heating the primer dish which results in the stove getting hotter and vaporizing fuel faster.

I added a ring shown in the picture on the outside to replace the cut off section and repeated the test with the "L"-Stand and it ran for only 2:20 minutes with a flame of 1-1/4" and frequently the flame was lifted off the burner jet hole which heated the pot poorly.