I'll send the boxed one in to have the caps replaced after the other one done. I'll just leave a note to be careful with the box.
Um, just a thought but take the Duo OUT OF THE BOX before sending it to be fixed? It'll save on shipping and you'll know no harm will come to your cardboard.
As for being sealed, isn't the US Duo box just a flap or did the retailer put a sticker over the opening? I could swear, when working Babbages, we manually opened the box to put in the bonus bundle game we had in stock before we put the sleeve around it (when they started the $299 promotion). But that was many beers ago...