Currently have basic subscription on Sky+ and have an HD TV. Would like to watch some free HD channels but not willing to pay Sky the £10 monthly HD mix fee so I just bought a second hand HD box off ebay which I intend to install myself - have found instructions by searching on here. My question is will I be able to watch the free HD channels or will Sky insist I pay £10 for the HD mix? There seems to be a lot of conflicting answers about this. If I don't have to pay it, will I automatically get the free HD channels once I have installed it and done a callback, or do I still have to phone Sky and get them to pair the card and then try and explain to them I only want the free HD channels?