Since I hand sand my parts to fix 3D printing imperfections, it makes the black parts look dull
like this. For that reason, I hesitate to try to offer high quality parts in black. A coat of black spray paint or lacquer might restore the color. I'm not sure how that will hold up over time though.
If mounts are attached to the rear arms and pointed toward the front of the Mavic, I don't think you'll notice a difference between that and actually mounting them to the front arms
(when viewing the Mavic from a distance). Are there other people watching this thread that would rather have the lights on the front arms?