You can tighten the screw in the base of the 510 with a 5/64 I allen wrench I believe that is the size . It helps to hold the center post with a small pair of pliers while you do this . Don't over do it on tightening the screw . The more you tighten the screw the center post will have less material sticking out to make contact with your mods center postMy center post is spinning on mine. Do center posts "screw" into the base of atomizers? Is this a situation where I can tighten the center post by spinning it? I can turn it to the right, I think it's the right, and it reaches a point where it stops spinning but when I try to tighten the screw to trap my wire the post spins to the left. Is there anything I can do?