From various investigations, it is quite true that the AP Bands endlnks can fit their own bands as well as the OEM to giva a nice flush against the watch lugs. Oracle will also fit but will leave a gap between the lugs and the strap - they only work with their own straps. So, if you are willing to invest for the most accurate, the AP Bands endlinks is the only choice, or getting the gen. links whcih I don't know will cost you how many times more.