dont worry sub, nothing bad will happen. Just do it as I told you.
So when the center post is crooked, is it that little plastic O-ring that is doing it? I really feel like the threads are screwed on perfectly, it's when I tighten it that it goes crooked.
And also, I'm terrified of forcing the post straight because I don't want to crack the ceramic, either! Especially when I have screwed it on perfectly before, so I know it can be done!