Rail wheel system for track drawers

My dishwasher broke. For the 2nd time. Instead of paying for another 30$ piece that will break again. I designed a fix in openscad. The fix consists of 3 pieces: the wheel, a hub and a washer. the hub allows the wheel to spin around it. The wheel goes inside the side track in my dishwasher. The washer keeps 0.5mm of space between the hub and the metal washers. The whole thing spins on a 1" #8-32 bolt.

All the measurements are parametric, if you want to make your own.