Just finished these up for oyoyoy. I initially wanted to use Born Crucial SPRs for the large bearing, but the plastic wasn’t quite thick enough. So, we decided to just cut the bearing seat out of a Born Crucial SPR and silicone recess the yoyo itself. I used Duncan spacers for the small bearing version.
Flying Squirrel. Just a simple silicone recess and a clean bearing. One of life’s simple pleasures!