Originally Posted by
gugie
Try everything you can to remove it, lots of good ideas here. If it ends up stuck, you can drill it out if you're careful with an undersized bit, then tap it out. I've had to do that a couple of times.
In my experience, while drilling it out, it starts to turn when you're about halfway through. I've also done frozen derailleur stop screws, etc. It's actually kind of fun. And yes: penetrating oil regardless of your method.