I meant I don't remember a run with that modification.
Buckminster Fuller had a feature that didn't make it to his Dymaxion prototypes. He called it an 'air keel'.
You could view it as sponsons or spats for the wheels and a 'cleft chin' converging duct in the soft-rounded nose to provide a central jet of energized air. The nose looks more bluff, too; more like Baby than the prototypes.