Cheap DIY Quadrocopter

hi there!
this is my first self made quadrocopter.
total cost of this quad is 250-300€
Flight Time: 15-25min
take-off weight: 1,4Kg

--- detailed Building Instructions comming soon (maybe)---
i think you can do it even without a construction manual... its easy ;)
im bad at writing manuals.
Changelog:
---
24.08.14:
- added "abdeckung_v2.stl": now you can see your receiver and KK2.1 Board
- added "landegestell_verstaerkung_v2": you can now mount things on the landing gear (for example a GoPro, but you need to build your own mounting kit.)