Hubsan X4 Race Chassis (v2)

English:
Inspired by http://www.thingiverse.com/thing:636591 I created my own race-chassis for the hubsan X4 (first generation, with only 2 LEDs) with 7mm motors.
The chassis, printed in PLA, weights ~8.5gr, what is nearly the same weight than the original chassis. With a stripped Keycam (http://www.chucklohr.com/808/index.shtml) and a 380mAh-battery, the complete copter is about pretty good flying 43gr.

v2-Changes:
After a few flights and crashes, I decided to do some minor changes, t