I took my YotH MP-10 apart to de-goldify the parts, and now I'm having an issue with the arms. If there's anyone that's disassembled this figure, could you please tell me if there's a pressure plate in the sliding mechanism of the upper arms, and if so, what does it look like? There's a hollow spot in the upper section that slides along the rail to allow the arm to collapse, but it seems like there's something missing that keeps the arm from wobbling around. I have a bad feeling it may be spring-loaded and the piece was lost along the way. Thanks in advance!