My friend has been through 4 eGo batteries in about a month, keeps breaking them in his pocket. He's not in a position to be spending money on a nicer mech mod yet, so I found a JM mech on FT for real cheap. I was wondering if anyone has one, and is it worth spending money on? I know you get what you pay for, but there's not a whole lot going on with a mech. My biggest concern is the thread quality and the lock ring. I'd hate to get him into this mod, only for the lock ring to fail, and end up venting a battery in his pocket.