Okay this is [N]ot a put down, but more of a proper way of cutting the grass with a weedwaker, you have to utilize every swing of the machine, if you are swinging from your right to your left , keep the head of the spindle in the grass, it matters not which hand you are, left , righted or Amber Dexter. You must maximize each swing motion. Repeat, this is (NOT) an intent to critique you. So please don't take it as an insult.
