Balls spinner (simple and economic)

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I Designed This Spinner Because I Only Had 1 Balls Bearing(608-Rs) And A Lot Of Little Balls(15.4Mm Diameter, You Can Change It)! It Is Cheaper Than A Normal Spinner Which Uses 4 Balls Bearings. Now I'M Trying To Improve It Using Steel Balls. Please Let Me Know If You Can Do It! Hope To Be Useful!

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