Ever since I put my first build on the Dark Horse rda, the center post has spun. It is quite a hassle trying to work with (having to use pliers to turn the post back while still keeping a tight connection with the screw) and one of my friends gave me some insight on how I may be able to fix it. He said that I could possibly adjust the "screw" at the bottom of the rda to tighten the post up, but I am afraid to adjust it and mess something up with the connection. Has anybody else had to deal with this issue? Being a college student I don't have too much extra money and I would like to avoid buying another rda at the moment.