Hello Dave, good to see you pop up and hope you are now fully recovered. Well your official disbandment date may be correct, but I have a photo of the team lined up at Bruggen in December 1960. Of course, they may well have just been operating as a regular squadron, but their Hunters were still all black!
Of course I won't dispute the numbers that the Blue Diamonds achieved, as you're quite correct, so totally dispels 'bluesafari's memory of seeing "22 Hunters looping in 1961 or 62" The facts would be "16 Blue Diamonds Hunters"!