Crap. Now I have a working adapter, but it seems that my switch is messed up. It only fires about every third time and only if I really REALLY crank it down. Often when it does fire, it seems as if it's only getting a small amount of current.
With the switch disassembled, I can see that it has an area on the ring around the button that has a shiny section, not the matt finish of the rest of the ring. Could this be part of the problem?

With the switch disassembled, I can see that it has an area on the ring around the button that has a shiny section, not the matt finish of the rest of the ring. Could this be part of the problem?