The Quadifier Diamond back DJI O3 is a 5 inch freestyle frame that is designed to be nimble, agile, efficient, and fit a DJI O3 system. I have always been a picky person when deciding on a frame. The Diamond Back is a frame that fit all of my requirements. It has the strength and looks to make your jaw drop.
 
Features:
    Designed for 20x20 and 30x30 stacks
    Has 20x20 mounting in the back for any HD vtx of your liking
    Comes with all mounts required to mount the O3 system
    Squish X for smaller size and better gopro shots
    Gopro mounts available
    5mm arms
    Fits micro 19x19 size cameras and the DJI O3 Camera
 
Squish X geometry
    This frame is designed with a squish X geometry which gives the quad a slightly smaller size and keeps the propellors out of your fpv camera or gopro's view.
 
My personal race setup:
    Talon Giga fusion stack
    Foxeer micro predator
    Foxeer lollipop
    Talon 2207.5
    Azure power 5148
    Tbs unify 
    
Package contents:
    Diamond Back DJI O3 frame
    Hardware
    TPU DJI O3 camera mount
    TPU DJI O3 antenna mount
    TPU DJI O3 air unit mount