I've been keeping a close eye on the WBO2 gauge, but it's difficult to say since the mixture is really swinging around a lot, due most likely that I still can't seem to hold a stable idle when cold. It surges from 500 to 2,000, then back down, then up... And yes, I know I've got an arseload of fuel thrown at it right now. If I've gone too far then I never noticed the sweet spot...