ORIGINAL: w8ye
I find the LS & HS needles a little bit interactive.
When fine tuning for effect during flight, If I make the HS a little richer - I often need to lean the LS a like amount. and vice versa. If I do not adjust both - the midrange will get out of hand if one needle is tuned richer.
I listen to "in flight" high speed acceleration also when adjusting the HS
I've had some "land and adjust" sessions. They definitely run a little different once you get them up in the air.