ORIGINAL: dirtybird
One question I have that I don't find an answer in the sticky is what tool do you use the tune those needles while the engine is running? A screwdriver doesn't work too well for me. It keeps slipping off the screw with all that vibration. And its dangerous being close to the prop.
I sometimes silver solder a hex head right on end of where the blade slot is. Works nice with a long "T' Handle.