Here's the article that explained-- http://research.rolfes.org/home/adju...n-a-gas-stove/ . Just like the article said, none of my screwdrivers would fit. They recommend filing down a screwdriver. What worked for me was the little 'key' that comes with a keyless interior doorknob---the thing you can stick in the hole if you need to unlock the door. Some of them have a flattened end and they fit perfect to make this adjustment