just unscrew them off
Because I totally haven't tried that...
They spin freely, meaning that they make no progress while spinning, thus making it impossible for them to "just unscrew off"


Cut down the middle of the nut, you mean make a slot in it? I don't quite get what you mean by saying cut down the middle of the nut. I don't see how chopping the head of the nut will help, could you ellaborate?