I bought 2 Innoking vv v3 kits. These are version 3, but they only have the 510 interior threads - no eGo threads. The threads on the 1st one stripped out within just a few hours. The 2nd one within a couple of days. Is there any way to repair these? I used a 510 thread adapter on the 2nd one until it just popped out and now won't screw back in and hold. I really think I'd like these batteries, but they are useless right now. Can anyone help? I emailed innokin and got no reply.