I told you before not to send the car back, and I don't mean that as a reflection on JPS at all. People do there best or not, but that doesn't mean it is good enough for what you want. Fool me once, shame on you, fool me twice, shame on me. Aren't you on number three or four at this point?
Hold Harmless? Do you really understand the total implication of that kind of agreement? Heck you could send the car back to him and never, ever get it back. You held him harmless, so you would have no recourse.
All of these builders, want to pretend that they have some, ancient chinese secret to building these cars, but in reality they don't.
The guys locally will do a better job, and with a lot less frustration and money. You will never see the 800 again, and you won't be any more satisfied.
You would be absolutely crazy to send it back.
As for the arguments regarding value and it being the first one and such, that is just plain silly. It is a replica, it will never be collectible in any regard whatsoever. Heck, even if the argument had validity, who on this earth would ever know which things on the car were done by JPS and which were done by someone else?