Be same in my mind too Return to base at customer expense for warranty claims ,
Write it on invoice , explain it to them , get them to sign a PDI , and sign to the listed warranty parts covered . Sign against " Customer returns at own expense "
The other thing is , if its popular , sell it to someone else cos if their main question is warranty their main thing will be to claim .
Our warranty Stops at DOVER , that's what i tell them .