Hey Eclypse,
Help me to understand...You said you backed your allen screw all the way out and tightened the cap and it is not touching?
Not sure about eclypse, but that seems to be my exact problem. Even with the set screw out to the point it almost falls off there is no resistance when you screw the cap all the way down, and no marks where it should be making contact. I think this would explain why my voltage stays the same in any cap position (?). Thanks again!