And another thing:
Although I've seen DAF literally dozens of times, and although we've lovingly dissected so many inconsistencies and continuity lapses over the years (the Mustang changing angles in the alley, how did Bond find Tiffany's house, why did Tiffany follow Ernst Stavro Dragqueen out of the casino, etc), another thought occurred to me only today:
Dr. Tynan routinely delivered his stolen diamonds to a helicopter pilot in the middle of the desert. One day, strangers Wint & Kidd show up and kill him and the pilot. They then take the diamonds to Mrs. Whistler, who is delighted to see them again. This means that Wint & Kidd were already part of the pipeline, at the same time as the chopper pilot.
I remember that in of the book, Serrafimo Spang (AKA Rufus B. Saye, AKA 'ABC') closed down the pipeline himself. In the film we can suppose that after assuming control of WW Techtronics, Blofeld also seconded the spangled mob, possibly in order to take advantage of their diamond smuggling operation.
I could believe that Wint & Kidd were only there to shut down the pipeline, if it weren't for their pre-existing acquaintance with Mrs. Whistler. So, where did the chopper pilot take the stones previously, if not to Mrs. Whistler?
Just another of those "it'll go by so quickly no one will notice" moments, I suppose - moments thwarted by the advent of home video and freeze-pause.