Is it ok to copy a W5 head and make it better or are we just mad at Speedmaster

My opinion is a Chinese product should only be bought as a last resort. So if you can source a part or tool domestically, new, used, NOS, NORS or even refurbished, you should do so before buying Chinese. Hell buy Mexican or Peruvian before Chinese.

I think too many people give the Chinese products a free pass because they're cheap.