this frame has mounts for 7mm motors and the hubsan h107(C,D,L) flight controller. it weighs less than 4g and a built quad with 500mah battery and ladybird props weighs about 33g. I fly mine with a push-motor setup - therefor I use electrical tape to secure the FC. Update: There's a slightly modified version ready to download. it has open motor mounts and the rounded corners for improved durability. I recommend printing it in ABS