While checking my blades on the E12M I found that one of them would move up and down a lot—maybe 1/8 to 3/16”. It seems the whole armature is moving in the body. I have a vague recollection that there should be a wavy washer in there (?), but not sure it would take up this much room? Anything else to look for when I pull the motor off/apart? Thanks. Thon