Thank you, Jeff.
The reason I'm so militant about it is this; The idle screw is NOT for adjusting the mixture, only the idle speed, period. You may find it changes things due to having a higher idle and so maybe the bike seems smoother when running at low speed due to it not boggin down ect. BUT the screw only changes the idle speed via adjusting the position of the slide, nothing else.
BTW, nice bike.