his own products. If he farms it out to an consultant than he would be mis representing himself by saying he designed it, instead just stamping his name on it. You are making all kinds of assumptions in your statement like you are there with Greg in the process. He has had more than one version of his exhaust systems. "Trail by error".
"Yes, I know more then JWT. Someone has to be the top dog, and it just so happens it's me." Nixit