Absolutely - In the US anyway, it's illegal to void a warranty because you modify the product. They don't need to cover any damage done by the modifications, b

Absolutely - In the US anyway, it's illegal to void a warranty because you modify the product. They don't need to cover any damage done by the modifications, but they can't deny warranty coverage to anything else. I'm not an expert, but I think the relevant law is the Magnuson-Moss Act.