I am @ 1,750 ft here. Most of the time the air is really dry. Not as dry as where you are. less moisture = more air %age wise. Its been running about 80-90 degrees here during the day- higher temps require leaner settings. shure ya know this- others may not. I run about 1, 1/8 on the main. about the same on pilot.- aa- slo adjustment needle.- Thing is tho- I do not have a single drop of junk gas on the place. In the r-c and the gas that eventually winds up in the weed eater- 1/2 VP-110 C -- 1/2 92 octane nonethanol- 32-1 ratio. This mix tends to run richer than junk gas, allowing me to lean the settings out further. This gives me a solid base line to work with--the gas i use. At my humble dwelling, every 10 degrees requires about 2 minuets change on the carb settings- using the hand on a analog clock as an example. This is with no change in moisture in the air. I am not actually chaseing the tune- I just keep the settings- air temp- moisture-ect put to paper- makes resetting a lot less time comsuming- just set and go.-- learned this many moons ago with dirt bikes- example- starting out @ the trail head @ 35 degrees-1,000 feet- going up into the sun where its 80-90+ degrees @ 8-9 thousand feet- and having the air filter getting dirty the entire time---