[UrizenII]

Although we are not currently using them, we are considering using neodymium magnets from an old hard drive, but I have a question about the legality of these. The magnet itself is obviously allowable, but our problem is the way the magnet is mounted to a non-explicitly permitted material; like I said, the magnet is from a hard drive, so it is incredibly securely mounted to a piece of material that acts as a magnetic insulator. I don't want to try to take the magnet off the mount because I am afraid we'll break it, so my question is this: would it be legal to leave the magnet as is and use it on the minibot, or would it not be permitted since the material it is mounted on is not on the list of allowable materials and so is technically illegal?