Two well thought out responses....[8D]

May I add one more?

While there's certainly no reason to get the little beasty lean, it will require a bit of leaning as it breaks in and you can also lower the idle RPM if need be which was an issue for me as the models tend to taxi off when on pavement and running at 2000 RPM. They also exhibited a "reluctance" to land with the idle that high. Once they loosen up a bit, mine are quite happy with something in the 1700 RPM range with 16x6 APC props. I do find that there is usually a bit of adjustment on the high speed needle with significant ambient air temps like Winter to Spring and Spring to Summer temps usually require just a touch on the high speed. Please remember that it's not an OS or something and I'm talking about screwdriver blade widths when doing that, not 1/8th or 1/4 turns....

I also use a "flight idle" mix on my models since I went to GS gassers. I used to just click up the throttle trim on my glow models to fly and click it back down to land, now I just do a throttle/throttle mix on a switch to kick the idle up a few hundred or so RPM when flying. That way you can have the low idle on the ground and there's not much chance of it quitting in the air.