Good to hear the Chinese reproduction blades appear to be decent metal. Sometimes they make perfectly satisfactory stuff at a good price, but they haven't got the universal trust and respect like Japanese, South Korean or Taiwanese made stuff, so caution us required. I would periodically check for fatigue cracks on the first set, with a light, and if their integrity remains throughout the life of the blades, feel confident to get them again from the same source without the need for any more caution.
