Yes he can void the warranty. By your own words, printed many times here, the interior is the case. By changing the interior, Jack could claim that since its a major component, and according to you, THE major component, being swapped out, that the case can no longer be considered his. The single easiest way around the Magnuson act is to claim that the replacement part is over 50% of the product and according to YOU, many times, it is. So you lose, again.
You cannot apply this law in an automotive analogy, whatsoever. What you're doing is in essence jacking up the radiator cap of a Ford and putting a Yugo in its place and expecting Ford to hold the warranty.
You and anyone else would lose this argument in a second in any court.
JV
All right. I will accept that. So your argument then is that the interior IS the case and more than 50% of the work? I am fine with that and fine with Jack voiding his warranty because of it.
To which I say again that I will honor Jack's warranty and repair any part of the case that Jack would cover as long as he won't. You can't get a better deal than that.
The case is transformed into a more protective unit and the customer loses no warranty.
See we can agree on something.