Ok, so here is the situation, I have a PDI Palsonite Cylinder Set with a hard piston. On the very top of the piston is an O-ring, and this O-ring keeps falling off. I use a 380% spring, which might explain why it falls off, but I have to constantly re-glue the O-ring on every 500 shots or so. PDI says to use superglue, but superglue doesn't hold rubber to metal very well unless you have some extremely good stuff. I was wondering if any other sniper had a problem with this, and if they did, how did they fix it. Also any extremely good superglue names are good too, thanks.