It would be great if you could make an idiot-proof resurfacing machine. It's possible to do near-prefect resurfaces very quickly with standard equipment if they are done correctly and often enough, but it seems more common to do mediocre resurfaces by racing round, not using enough water, not using the right eater, not using water at the correct temperature, not setting the blade at the correct height, not replacing that rag thing they use often enough, and generally not giving a stuff about how the ice comes out.