Nicely done Jerry. There are two things I think should be added. First is a short guide on how to spot an issue with fuel lines and air leaks. There are too many threads to count on RCU from guys who simply can't get an engine to tune, and I'd wager 90% of them are caused by either a damaged fuel line letting air bubbles in or a loose backplate, bad carb oring, or bad front bearing letting the engine suck air. The second is explaining that engines gain RPM in the air so setting them a little rich is actually needed for optimal power. The amount they need to be set rich is determined by the diameter to pitch ratio and how slippery the airframe is, which determines how many RPM the engine gains in actual flight. For example, my Kaos running a TT .46 PRO turing a 10x6 prop needs to be 800 rpm rich on the ground (as measured by a tach) in order to have top horsepower in the air. If I go leaner than that, I see a noticeable drop in level flight speed. However, my Ultra Stick with a ST G90 turning a 13x6 only needs to be about 300 rpm rich for optimal power. The determining factor of what the optimal needle setting is always how the plane flies, not what the tach says. Which is not to say you're wrong in how the initial settings should be done, just that it's not clear in the write up that the final test is what the plane does in the air.