Smallest R188/M4 Tri-spinner for little hands

My nephew asked me for a fidget spinner that he could handle with his little hands, so I designed this spinner as small as I could. It is just 35mm width!! It uses small and nice R188 bearings and standard metric M4 nuts. The cap parts should be printed with support and hot-inserted in the main body. Cap parts could need some sanding and a glue drop or also hot inserting. Main body doesn't require any support as it is 45º chamferred, not filleted. Also a bit of sanding would be fine for the main