I have two chains that I've sharpened a few times - myself - so they are still in good shape... toothwise. Trouble is, they've stretched beyond the capabilities of my Stihl's bar-movement range to take up the slack. I've had a link taken out of each of them.
I'm curious... How safe is this? What are some pros/cons of having them shortened like that? (I've never done this before, and don't want to wrap that chain around my head someday when I'm cutting wood.)