Just got this in the mail today. Open up the box, unpack, and hear a rattle in there. Figure it's a loose screw, so I crack it open... but it was this. Which is the same as these two... Seem like metal, not magnetic. Can't for the life of me figure out where this third ring would go, or how it could have broken into 4 pieces once is was put in place and secured in the chassis. Loose piece from the factory that got slipped into the chassis, and then broke up in shipping? I know, I know... send it back, right? Well, I really want to use this thing on a gig this Friday!!