I have acquired 2 BiS Rodimus' recently. I noticed that both of them have issues with the left arm. This is the arm that has the saw attachment in it. The ball joint on the left arm of the 1st Rodimus is two small and the arm pops out of the socket easily. On the 2nd one, the ball joint on the left arm is too big for the socket and the arm pops off easily. I have tried switching them but, problem still exists. For all of you Radicons out there, what can be done about this problem? I know I can use some clear nail polish or some masking tape on the one that's too small but, what about the ball joint that's too big for the arm socket? Also, for those of you who own this version of rodimus from this set, how widespread is this problem? Does yours have this issue too? THANKS for posting!!