This is a frame I designed for the FT gremlin style mini brushless quadcopters. it has removable arms in the even of a break. I essentially just wanted a mini version of a 250 style race quad. The camera mount is for a eachine tx01 camera. I used aluminum 14mm m3 stand offs on mine but included a standoff file if you wanted to print them instead. top and bottom plates I drilled the holes out to 3mm and the arms I tapped with an m3 tap.

I also included some earlier arm and chassis designs. Arm v2 has a spot that locates the ESC and wire routing. It looks really clean but isn't as strong due to the holes in the arm. printing with multiple outlines and thicker layers may help here. Also included a lower chassis that locates the FC right in the center of the frame. You can strap it down with a rubber band. That way it can be easily removed for service without having to use double sided foam tape every time.