Glowing Core for Mag-U Levitating metal Fidget

NOTE: This is NOT for the spinner, its JUST for the small 4x4x45 opening which fits this 3.9x3.9x43 hollow cylinder nicely, compleet with threading on the top for an m2 bolt to allow easier removal than pushing up in the holes when in its open state, as those holes are what you see glowing when it does glow. You can even use this to add accesories to the top or a stand maybe.  

Sorry its not for the actual spinner but i got it for under a hamilton (thats a ten) on Ali. So whatever, its fair, i love the metal but I do wanna try and print a plastic or nylon or even cement or clay version somehow to add weight or ill just pack it with metal bolts or washers somehow, Although i do see some similar ones you CAN print and maybe pour clay or concrete for weight or use washers or rely on the magnets for weight and a small bearing, id like to make it use a skateboard bearing many of us have but oh well. 
Heres one that is similar that could be modded to basically eb a larger version of this ! well revisit thisdd later https://makerworld.com/en/models/63508-hovering-magnet-fidget-spinner#profileId-66467

anyway this is the best way to get a glowing stick in teh center as advertised sometimes, mine didnt come witha  glowing rod so , i couldnt find any real sensible battery packs that i could stick on the end of 3.5mm LED around a small difussion rod, and have a battery i can slide down teher witha  small button, as that WOULD BE DOPE, ill work on that next!