Cup and cone bearings are about the best you can get with some manual fine tuning. If you carefully hone the surfaces with wax and toothpaste, and then select t

Cup and cone bearings are about the best you can get with some manual fine tuning. If you carefully hone the surfaces with wax and toothpaste, and then select the beads running between the two halves of the bearing to have almost equal size, you're already good enough for track cycling championships. Regarding the sponsoring by Shell, I doubt Shell cares. They are paying for this with pocket money, and they get some greenwashing in return. Doesn't sound bad.