Sitting yesterday on the porch and sipping a sun downer. Looking at my flat tire on the farm wagon. Idea came up!!
Cut the axle in half. Plant it vertical in the ground. Lift up the hub. Remove the brake pads. Mill the brake pads down. Glue coils onto the milled down brake pads. Put the hub outer shell in the same milling machine and mill 50% down in the inside. Glue permanent magnets to the inside of the hub. Fit the hub back onto the stub axle.