OK, I had to get there first.^^ I've been doing my own filing on my 16" Husky 435. I've been through a bunch of big rounds over the last two years where I just open up the throttle and stand there for a while. I sharpen (the husky file/guide/kit) after a few tanks or a really big day. I'm a southpaw, and it looks like I'm hitting the teeth harder on one side than the other.
Since I noticed, I'm trying to go back the other way. Should I keep trying to even them out or is it time for a new chain? The photos are of the worst difference. Thanks!