I love my P4 but I remember spending some time filing all of the edges of the plier jaws to eliminate what I considered to be very sharp edges. I then took a "Red" wheel (an industrial type of scotchbright) to the edges and they are now what I think they should be out of the box. Mine is a pretty early model, perhaps newer ones are better in this regard. But the edges where bad enough for me feel like doing something about them.

I also filed a notch in the wire cutters so wire doesn't slip out during cutting. Larger Leathermen have this feature. I don't know why they didn't do this on the P4. Perhaps to discourage users from cutting wire that's too big.

After these modifications, I really like my Squirt. I keep it on a Nite Ize. small "S-Biner" hung off my BOB. It's funny how often people come to borrow my P4 at work. About as often as they want to borrow my Surefire P6.