I farm rice and was spot spraying today with my Kodiak four wheeler. I got hung up and stripped the rear axle to ring gear splines. I need a quick fix don't really have the time to wait on the part order. I have a buddy that can cut a keyway in the ring gear with an edm at work. Problem is I will have to cut the keyway in the axle. Can this be done, or is the axle to hard? Carbide cutter? Does anyone have an opinion on the durability of a key in place of the splines?