I noticed that when I sharpen my chains there are often very small burrs on the upper part of the cutters. A couple of days ago I tried deburring them with a flat file (very light stroke or two), and my chains seemed to cut better. Maybe I was just being more careful when I sharpenend them, or maybe deburring helped. Anybody else do this? Am I maybe pressing too hard when I sharpen my chains and that creates burrs? Looking for thoughts on this.