Hi all! I am getting ready to wet sand the motor housing for a Kirby Model C and cannot figure out how to remove the armature. Usually, I am able to just pull them out without much fuss, but this one seems to be stuck as if a special tool is required for removal. It does spin freely, though. I cannot remove the field without removing the armature so I'm not sure how to proceed. The picture below shows where I had to stop. Any suggestions?

