Well, I'm an idiot. I bled the brakes and kinda forgot that the reason for bleeding them was because I had to replace the switch. ~sigh~
I drained the nice clean fluid, found a 22 mm wrench and attempted to remove the old switch. It ain't budging. I unbolted the whole assembly from the (weak) attach point so I wouldn't break anything, but I still cannot get it to move. I really don't want to remove that little hard line that comes off the other end, but I don't see any other way of getting the casting out where I can get some serious leverage on it.
Any other ideas?