About this 3D model
i used cura to set the appropriate height and diameter of my arm, dont worry this sucker only needs rough measurements, i also left a cut in the ring to assist with putting it on your arm Note: i just stuck the top of a Drang (from destiny 2) on mine but im sure you could do a little better like glue a phone case on to hold it a little cooler or look like twitch from r6s. you may customise but you cannot profit off it