I have had my Vmax for about a month now and have had no issues until lately.

It seems as though my center post in the 510 connection is too low. I would get the F1 or F2 error with my mini vivi nova and would have to back it out a couple of threads to get it to work. I am having the same issue with some other cartos as well. When I back it out the vivi nova feels loose and sloppy in the threads. So, using the search in this forum and the advice from this thread, I was able to raise my center post. But, the center post seems looses and works its way down while I am vaping. I have never over tightened anything on the device as I was aware of the danger from reading this thread.
Is there any way to fix the center post so it does not move up and down so easily? I have submitted a trouble ticket with the vendor and am waiting to see what they suggest. Oh, I have the stainless steel Vmax with the blue button, red led, and the ego style top.
Is there a reason that the center post is free floating, it seems as though it would work better if it was a solid connection?