I have made cast tires before for my 1/4 dirt bike project. If someone will make the 1/4 scale diamond pattern Goodyear tire for the CARF Corsair I can make the silicon mold and cast urethane tires. I'm also interested in the diamond pattern 1/4 scale tire for the CARF P-51. In both cases I'm using the Sierra retracts and wheels.
I will dig up some photos of my SLA tire, wheel and molds. Comes out really well and very durable!