Ok, now i know this topic has been , But i have a ?. Does it matter who makes the sprocket? Is there any difference between vortex, driven, renthal, etc? Beside from 520/530 and how many teeth. Has anyone had any bad experiences with them? Are there any brands I should stay away from? Just looking around on eBay and wonderin why they differ so much in price. I've seen kits go anywhere from $175 to well over $200.