I didn't think I would be back so soon for another update.
Another four flights this afternoon. During the first flight it had a bad case of the hiccups, so I started leaning the top end. It was leaned 9 clicks over the next 3 flights, with only a couple of coughs during the last flight.
That puts the main needle at 1 turn, with the reg still at 0.5mm out from flush. The engine now has 25 flights on it.