After three 5 minute flights today, it seems there in no improvement in the low to medium throttle range. It has great top end, but it still sputters when it is not at the top end of the throttle range.
The carb settings are a little below two turns. When the low setting is around 1&3/4 or less, you don't have a good transition. The engine runs about 20F cooler with the richer settings.