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I'm glad you figured it out. It is not critical which bearings you use for this project since it is just a fidget toy. I usually use the cheapest that I can get. These are 608ZZ ABEC-7 for $2.69 for 10: https://www.aliexpress.com/item/High-Quality-Metal-Sealed-Shielded-Deep-Groove-Ball-Bearings-SkateBoard-Scooter-Roller-Wheels-ABEC-5-608ZZ/32732998238.html.

I like to keep a bunch on hand for projects and I am always giving away these spinners.