On a 3/8” chain, I take a 7/32” round file and hog out below the cutting edge giving the tooth more chip room so it can curl and get exhausted faster. The top edge of the tooth I use a file guide with a 1/4” round file. This puts a steeper angle on the cutting edge so the chip isn’t pushed into the lower arc for clearance. The raker depth I set to the type of wood were cutting. For pine it’s .040” and more. For hardwood it’s .030”.
I change to a rim floating sprocket one tooth larger. Plug the govenor in the carb.
The rest is your state of mind. Back in ‘83 I lost my job because of cheaper imports from Japan. So if there’s a Japanese saw in my class the fangs came out.