Bump for the peanut gallery. First, a comment that I haven't seen mentioned. I think I have better results with a really snug new bar. As they wear and open up, there is more room for chatter. I'm liking the solid, smooth feeling I'm getting by filing a new chain on a new bar. Zero chatter. Snugged up with the brake on its taking a nice edge. And a question: any tips for smoothing the fresh burr? As you file any edge you effectively raise a small burr. In sharpening a knife you work the burr in both directions, then gently remove the excess. I don't recall mention of folks de-buring their cutters.