I bought a Deuce of Spades trowel a few years ago, and just recently noticed that they now appear to come with serrations or "teeth" on the digging edges -- something I wished they had had when I first bought mine. Is it possible or advisable to file or Dremel some teeth into a titanium trowel like this at home? 12 times out of ten I wish I could cut through little roots a little easier, but not going to spend more money on a second trowel.