A top that uses this Makerworld print.https://makerworld.com/en/models/93385?from=search#profileId-99949To launch. It spins for 4 minutes. I embedded 5/16 by 5/64 inch magnets to add more weight to the outer ring. Modeled in Onshape https://cad.onshape.com/documents/e9a1cc7678b64a4f65921a50/w/6e99a66d0dc4150d2c291a76/e/0ee1bed2fe95fccd4e9dc954