Has anyone figured out how to mod the Zen two 510 top So that the battery doesn't rattle anymore?it seems easy enough. I was thinking the JM22 rout where I get some all-thread that has the same thread size as the positive post screw and add a nut to the end so the length can be adjustable. Does anyone know what size that positive screw thread is? Note: it's not the same as the screw for the switch.