[Jeff Higgins]

Why anyone would service or operate an under warranty vehicle outside of the factory specifications is beyond me. In doing so, one assumes all responsibility. It's just that simple. If you expect someone else to assume responsibility in the event of a failure, you absolutely must follow their recommendations or you don't have a leg to stand on. This one is entirely on the owner. If he wants to pursue a warranty claim, and if that means you have to tear the thing down, he needs to pay your hourly rate. This should in no way turn into any kind of a burden to you.