Fc-26

Your adjustment is okey,i have 4 engines 3W and when is cold the transition from low to high is slow and when the engine is new take a litle more time.
Don't touch your neddle and fly.Is possible that the low neddle is a little rich but if your engine is new just fly.
when you are going to fly start your engine and wait one minute until he take temperture and warm up.
How many flys do you have with that engine?

Oscar Silfa