Like I said to begin with Im not here to argue. But I believe I read a post somewhere about TiredOldman adjusting like I do but I could be wrong I might have read between the lines. I have done many of weedwhips and chainsaws this way and never ever have had to go back and check a plug for lean condition always have set by ear. And have never burned one down from it, when I change out a plug they have always been coffee and cream..