I bought two pairs of all-metal drive shafts. The original drive shafts of the A242 is made of plastic, with a screw hole on the end. Apparently I was not alone in my fear of the shaft breaking because of collisions, someone had already made an all-metal upgrade. Instead of fixing the wheel on the shaft with a simple self tapering screw the metal shaft is threaded and comes with a niloc nut. Perfect. Skookum.
I had to print new hubs for my custom wheels, but it was worth it.