Well, I'm going to have to disagree with you RJM1982. First of all, I'm not a "tweaker". And I'm not trying to wring out every extra RPM that I can out of an engine. But there are days that I get to the field and I may have to move the needle one or two clicks to deal with the weather that day. Here in Oklahoma we also deal with 40°+ temperature differences in a day. It can be 60° on my first flight of the day, and 100°+ on the last flight. The needle usually has to be adjusted sometime between those flights (usually to make it richer so the extra fuel will keep the engine cooler). You can't just set your engine and forget about it, you have to deal with the conditions on the day you are flying. I'm not saying you need to tune it before every flight (those kind of people drive me crazy), but it should be checked at the start of the day. Those that live in milder climates usually can get away with not checking, but those of us that live in more "interesting" climates have to deal with changes like this.

Ken