Sorry to the poster, but don't rely on that plug color chart for a two stroke engine. Some of the plug pictures it show would be ok for a four stroke engine, but dangerously lean for a two stroke. All in all it is better to tune by a tach, or by ear if that's not possible with an airplane engine. Plug readings are very misleading, especially with todays gasoline.
Just keep it simple. Adjust it in the configuration you are going to fly it on the ground, richen it just a touch, (like 1/8 turn or LESS), and go fly and see how it does. As mentioned, the low speed needs a little tinkering, and you should re-check the high after playing with the low, but the good news is once you have it dialed in, you will probably not have to touch it again for a very long time unless you change fuel, prop, oil, etc.
AV8TOR