Im in the same process. I always did the same, by the seat of my pants. I am using an 850 DP demon carb and it is showing the exact same readings. I can get it into the high 13s low 14s at idle but as soon as I am off Idle its in the low to mid 13s. WOT is still the same. Its 16 degrees here so I figure It will have to wait until spring to get it sorted out. I do know a slight misfire will show a rich reading. I am watching closely.