I am not sure I like the way my new 2006 optima head rests are attached. I have had a couple that easily become disconnected from the white plastic post. Am I the only one with this problem? Are there any tricks to get the head rests back onto the post? I have ruined one of the posts trying to get the rest back on. Any suggestions? Also, where would I get a new post for the one that I have ruined? Thanks!