Joe is setting the low end of his YS correctly. There idle rpm should be set at 2000 but Ihave mine set at the 2000 for flying and when I roll it out to the runway I have my idle switch set for low idle and Ican get mine to just tick over. Ican't remember the rpm right now but it is lower then YS states they should be able to idle. Ihave it set like this so my planes don't get rolled around, 2000 rpm will do that unless you have breaks on the plane.
Once you get the low end set you should never have to tinker with it again, other then BIG weather changes the only time Ifiddel with the high end is if Ichange the prop type or size. Ican't remember except once ever having to reset my low end on my YS engines, set and forget.
Needle tweakers make me crazy to watch, if it ran good the last flight why are you changing it again?? Come winter my high end will need to be opened up 4 clicks and then left there for the rest of the winter.
There is a complete glow engine forum with factory support here on RCU for most major manufactures, this includes YS. If you are having problems it's a good thing to be able to speak with a factory rep.