Now a craftsman rank digger

After 1103 stacks of ghysal greens, I hit craftsman rank digging (A30). This came as a surprise to me because I was not expecting to hit the rank until I used at least 1200 stacks of greens because the last rank came just after I hit 1000 greens. I have noticed a big difference on dig accuracy and I even pulled up another cactus stem.