How do I fix baytery rattle if the 510 pin on the bottom of my mod isn't adjustable and my mod's topcap has a floating pin? The pjn soesn't unscrew, it just slides up to meet the 510 pin, and there isn't a screw on it's underside that adjusts any more than that. Working with an Anarchist clone mod and an OBS Crius RTA. Please help, thanks in advance!