Wear a cut-resistant glove on the holding hand
With a serpette knife, a slip during the pulling cut sends the edge back towards you and the hand steadying the branch. When you face hundreds of cuts in a day, wear a cut-resistant glove on that hand and an ordinary work glove on the knife hand for grip. It costs little, and it lets you work steadily with the 8.5 cm curve without worrying about a slip.
