Thanks Bob 78mm is actually what Motolita state themselves for their wheel... so simply Tring to find a nice inset that fits.... Not a huge fan of the Pepsi insert so might have to save my pennies for the Gelscoe black version ... am sure it's beautiful but £150 plus the Gin and Tonic and postage is a bit spicy...!!!! The Gelscoe one is small and fits the Motolita 78 PCD