The note can be found in Carleton Mine, on a desk near the shotgun contraption.
This makes no damned sense. It was such a simple idea: "Just sit in the chair."
Since the other day I've gone through three chairs and four shotguns. I've had jams, misfires, broken chair legs, bad aim, and every other thing. I should have known everything in this mine was rusted to hell.
No way I'm trying this on myself unless I'm sure it will work. I'm here to die, not to get maimed.
Time for a new plan.