I've searched through YouTube but haven't found this exact pen. It's gunked up. I've had it soaking in ammonia for a week and still skips. Apparently Sheaffer used adhesive to put this section together but with some heat it should come apart. Anyone done this? It looks to me like it should come apart where the silver metal meets the black plastic. But then there's that gold ring. Is it decorative? Or a section? Don't want to be reefing on the wrong part. Any help/advice appreciated.