He ran a business with employees. I doubt he made a single one of them himself.
16,000 hotstamps is nothing. Mason would have done that every other week, and by hand.
The person that physically did the stamping was interviewed prior to my writing the article and confirmed what was made. There is no 'speculation'. I cant help if it certain people will always disbelieve it because they bought the chips in question as 'real' and paid a high price for them.