Try at 2. And do cold start in the morning. If engine hesitate getting rpm, open a bit. If it seems solid, then you may tight it further 1/8. Do not lean it unnecessary.
Richer 10,000 miles are less damaging rather 10,000 miles of too lean.
Plus let it warm up well, if you want it bit on leaner side.
I have set it on 2.5 though. and mine seems ok with that. in colder days, i keep it on 2.75 usually for easy start and idling.