I'd ring Sky but my phone is with plusnet (no inclusive calls) so i'd prefer to do the pairing online. 1. Can two cards be paired to the same box? 2. Card A is paired to box A owned by person A. Card B is paired to box B owned by person B. Person A and B want to swap boxes (person A has 2TB but doesn't need that much recording space). Obviously they can't do it simultaneously, so what will happen when someone pairs a card to a box that already has a card paired to it? 3. Would using box C temporarily (old box owned by person A, faulty) solve any problems (pair A to C, pair B to A, pair A to B)? Thanks for any help.