Igor, it sounds as if you just may be slightly off in the other direction with that lever, since you ended up with the mixture screws open a bit further than normal. However if it's running well, that's nothing to worry about. If you start to have trouble with transients (e.g. it stalls when you drop the throttle from high rpm, or when you first open the throttle, etc.) you might try a small lever adjustment.
I'm sorry if I got a bit critical there - you've come through a Walbro rebuild practically unscathed, so you are a decent carburetor mechanic. Glad to have you aboard.
I'll close this thread.
