Over many years of watching speedway, I've seen them come and seen them go. The greats retire - Ove Fundin, Barry Briggs, Ivan Mauger, Hans Nielsen, Tony Rickardsson - and we move on. As in all walks of life no-one is irreplaceable. Yes, we might miss them for a very short while, but we move on to see the new stars. It's been happening since 1928 and will no doubt go on.