FWIW I have seen pics online of the "Sheriff Star" hubs with broken flanges, and I'd venture to say that those laced radially would be more stressed than those laced with a cross-pattern, but then again there's this famous interchange with Sheldon Brown concerning one that's laced X-3 and so...YRMV.
Still, a very handsome and sought-after hubset, I just wouldn't lace it radially if mine.
Campgnolo Record Track Hub Failures