So I picked one of these up a few days ago off 101vapes.com... I absolutely love it, but after rebuilding it like 2 or 3 times now when I try to put new coils in the center post wants to spin before I can get the leads fully trapped. Right now I'm having to put the base on a flathead screwdriver (The 510 connection has a flathead looking slot) and push down on the base while trying to tighten the positive connection down... It works, but I'd rather not have to do that. Anyone know of a fix?