I'm trying to switch out the freehub on this hub and wondering if it is necessary to remove the ring that slides to expose oil ports. It's located externally and has more to do with the hub bearings than the internal mechanism of the freehub. It would be nice to transfer it onto the new freehub. I was able to remove the piece of rubber that wraps around inside of it. How do go about removing it, if it's possible? I know it may be difficult to tell what I'm talking about without a photo. I was hoping someone had experience with this and could some how decipher what I'm talking about. Thanks.