Probably a dumb question, but I have 3 unused broadheads from last season that I am using again this season. They were on my arrows in my quiver. They are slick trick standards fixed blade. They still seem sharp, but I'm not sure. I need to find a few rubber bands for the old rubber band check. I've always just bought new broadheads every season but didn't this year. Does anyone recommend a sharpener? I looked on amazon and read mixed reviews on some of the ones featured.