Hi guys, I need some guidance please; I bought a new OEM 372XP and it has a rattle somewhere under the covers. I've checked the oil/gas chambers and pulled the top plate as well as the recoil side plate and its not there. It sounds like something is either loose or maybe some float of some type within the unit itself? Is this normal? I'm hesitant to pull the saw apart to find it. Any thoughts? Thanks in advance.