Not that it will help much,

But back in the day when I started out I was told by one of the field "wise men" to take an exacto knife and use the back edge of it, (the flat non sharp side) and drag the edge of it across the sharp side of the APC prop (the trailing edge). You do this until it's no longer like a knife edge, and this is how I balance the prop, taking material off the trailing edge. I also make the tips a little smoother. It's not going to stop the prop from chopping your fingers off, but you wont cut yourself digging through your flight box, or simply turning the engine over. I have not noticed any performance decrease, you are not changing the airfoil on the prop, just taking the "edge" off the trailing edge. I have since done this to every apc I've owned, and I'm sure it's saved me a few cuts.