Guys. My first ever oakley x-metal. Really excited. However, I found out after that it has the loose nose issue on the right side. Seems to be common. Bought it from a fellow on CL. Came with box, cloth, paperwork and extra rubbers for nose/temple. I think he kept the coin though as it is missing from the holding place. Can you tell me if this is 100% genuine and if I should get the nose tighten up at oakley or X-man?