Here in our office everyone have hubsan fever.

My college Miguel has designed this frame, it uses original hubsan flight controller and 8.5x20mm from 104C or 104D, it have 2 degree of "diedral" in all motors, we don't know why but it is faster in response than hubsan, probably it have mass is concentrated in the center and it have lower inertia moment.

you can download this frame in Thingiverse:

we are printing in PLA.

I hope you enjoy it!