This is probably a rather dumb question, but I need to ask. I have noticed that my bar ends always spin freely within the clip on's. The bolt is tight, but rather the anti vibe stick thing is the one that spins. Not like a fast, free spin, but enough to notice. Are these shaft things suppose to spin, or is there something that I can do to keep them from spinning freely? If I pull hard enough, I can pull the bar ends along with the anti vibe stick completely out. Thanks.