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

I recently saw a new casting from "Steven Sun" on Speier's site and he really gave it a very good review as he is using them for his Chevy program thru Chris Cobb. I have heard that Steven Sun is one of the best China castings and maybe the only one to use.
Im pretty sure this guy IS the Speedmaster head and intake manufacturer in CN.
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