Late to the game here, sorry about that.
But fwiw, I stretched and tightened the coil on my B1 and was able to run it about 50 degrees lower than I'd been using it previously. Did exactly what's described in the post above. Used pliers to tighten it as well. Very simple procedure. Though I did watch a few youtube videos of people stretching and tightening their coils first, just to make sure I wasn't messing anything up. You may want to do the same if you haven't done it already.