Apologies for re-asking what's already been answered in other threads, but I just wanted to be absolutely sure I had an up-to-date answer. I looked up at our recently-installed Sky dish and noticed that the front-bit (you can tell I'm not technical) seems to have 4 sockets. 2 have cables plugged in for the Sky setup and 2 are empty. Is it really as simple as buying a Freesat box and just plugging it into one of those spare places? No re-positioning the dish or other monkeying around? As I understand it, the Sky is using 2 cables because it is HD. Can I just buy any normal-definition freesat-branded boxes and use a cable or are HD dished different?