Printed at .3, 5 perimeters, 0 top and bottom layers and no infill. Use infill for caps. I am still looking for the perfect settings for those, 100% infill makes them too tight, 50% is a smidge loose. Try 75%. I usually sand the tops (small center) on a flat surface with sandpaper to flatten them and make sure they don't bump each other from any nubs left from printing.
You should be able to pop the bearings in from the bottom side without having to scrape the edges, it usually seems slightly looser that the top. If its too loose, increase the bottom layer extrusion to compensate. The outer bearing sleeves are cut out with a sphere so the center is wider than top and bottom. There will be a little play in them, which I kind of like because it make a little rattling sound when you hold it on end or move it around, when spinning horizontally it is smooth and silent. The 3 bearing design is my new all time favorite spinner. Hope you enjoy.