Hello buddies, by any chance someone managed to fix the issue where the top part comes off really easy and is kinda of loose? I went into my pocket to grab the mod, used to grab it by the atty and of course it came off instantly, and in more instances, it happened the same. I have loads of spare o rings from other 20 atties but none of them match as they should either the cap doesn't go flush and does not close fully or it's too lose.... any advice?