Here's a question primarily for those who sharpen chains freehand, but anyone is free to jump in like always. My sharpening jobs typically are "good", which means a nice edge - fine for anything I'll be cutting. I expect that most of the folks here who have done their own chains for a while would say the same thing. I happen to use just a file with no guide, but that doesn't matter - whatever method is used will usually get better over time, after a bunch of reps doing it the same way. But every once in a while after sharpening, the chain feels more like something that just came out of the wrapper (don't you just love the sound that unwrapping a new chain makes). My last one was one of these "factory jobs" - it makes you :cheese:. It can't be as good as the actual new machined chain, but it sure feels that way. No idea of how this happens - maybe it's only on a full moon. Is it a matter of having the file a half degree better - or maybe a quarter degree ? And then, how many cutters have to be better? I don't have a clue, and of course can't duplicate the factory job - the next one will be back to just good again. So, does anyone else find this same thing happens to them?