Would you trust a person who has the credentials from Oxford or the one who has them from Oxferd (note the spelling difference, grin) Most (if any) golf club clones were never submitted for approval from the R&A or the USGA.

As for me when I go to a doctor, I make sure they have credentials. Club makers have their own society and membership. Find a reputable one who has been around for a while say at least 20+ years and ask away.