Pretty simple Universal Gopro Mount for bottom battery setups.
Specially practical for little beasts like 3 or 4 inches.
Here on a "Peach" 160mm and with a Tattu 650mah 4s, but you can use bigger packs by just changing the size of the strap...
Available angles: 15° - 20° - 25° - 30°
For the "two colors effect", swap filament at 25% and 75% of the print.