You do have to not overdrive the machine, but the saw's max is 64, so that should have worked. I normally prefer to use dense invar boilers for the 100% efficiency once I'm past the first bronze ones but I have used steel in the past when invar was in short supply. Did you forget to give it water?
Hey Greg, did ferrovanadium ore get removed when magnetite was? Is black sand the only source of vanadium, so I should be sure to centrifuge it instead of magnetic separating it, since it looks like some day I will need vanadium-gallium wires?