I have several variations on a similar design. Its is a very useful design. Stacy had a great post a while back on geometry, and how the hand holds the knife and energy transfer. If you draw a line from the tip to the center of the bit, the index finger should be close to the center line. On yours, the index is a bit below the center line. (Not a criticism- I looked at my favorite knives, there was variation in mine, and Stacy was right- the ones closest to his design suggestion worked the best.) Thought it might be helpful in designing future knives.