UPDATE: The frame does not like the Syma controller. The gains are too high for the fast prop/small motor combo. The Hubsan controller is a much better fit.
I designed this frame to reuse the guts out of a Syma X5C I recently took apart. You could also use the controller and motor from a Syma X1 or a Hubsan X4, both have similar sized flight controller boards and the same 7mm motors. I used this with the props from an X4 and a micro FPV rig I designed myself. You can also mount the front arms backward to make a deadcat setup, although I'm not sure how it flies (probably fine as long as it's well balanced).
Print all parts separately, 2x Arm, 2x Arm_2, and 1x frame. Then assemble with hot glue ( no glue needed on the motors, they press fit in).