G5 makes a flat diamond stone that works well for their montecs. After the stone, I use a leather trap thathas a little moretallowy (if that a word....oily) feel to it than a normal leather belt...a couple of strokes on it and your good to go. Something like aSmiths may workfor the Muzzy, I think you have to takeem apart to get theforemost edge. A file always did the job for me if I had a burr on the Trocar tip. Good Luck