This was my solution to keeping my fingers out of the propeller. Icut the head off of a socket head screw and attached it the needle valve with JBweld. I can then use the correct size ball-end driver (I think it's 5/64) and hold it back at a pretty good angle away from the prop. Don't use a T-handle type driver, the extra leverage makes it very easy to over tighten the needle, which will ruin it.