This Drone variant, dubbed "Whistler", was conceived initially from one of my thumbnail sketches.
I like to think that a variant like this would be a "Service" Drone. Whilst calling it a maintenance drone would be doing it a disservice, I think it has that more practical look, in contrast with the Ambassador Drone.
Its used to getting its field manipulators dirty.

Modelled in Maya, rendered in Arnold, textures created in Affinity Photo