I recently purchased the new DJI E310 motor, esc setup. I've been designing a compact 450 foldable frame to fit easily into a flat profile backpack or laptop bag. So far without the electronics the frame is only 16mm. I 3D printed an arm in ABS and it weighed 35 grams. I guestimate after everything is assembled the frame will weigh about 300 grams, about 15grams heavier than the f450. My reason for building this is for easy travel with good video to take on vacation. Originally I wanted to go with Pixhawk, but after trying a handful of gimbals, the most stable 3 axis gimbal out there, for a gopro is the H3-3D, so I had to use Naza. Still waiting on some ball bearings from china, but I'll update as soon as I get her done!!!