I have a new set of Fusion blades on a Hustler 54 wb with maybe 10 hours on them. Yesterday I hit a good size rock that was half burried in the ground. There are a few small nicks on the blade. Should I try to sharpen them or just replace them? These blades are getting pretty "salty" in price. I would have to look to see what I paid for them, but I know I paid $44 for the Fusion blades on my 36 wb! Advice is appreciated! Thanks!