semi-H 300 quad copter frame

This thing is outdated, I designed new one with better arms and better frame options, please see http://www.thingiverse.com/thing:2167187

Designed for DYS BE1806 2300KV motors, mount is for M2 screws in 16x12mm grid. Props are 6x2 CF.
The frame is put together by 8 M3x30 screws and self-locking nuts.
Recommended ESCs - ZTW Spider 12A with SimonK software.
Powered by 2S LiPo 1500mAh.
Controller - CC3D Atom.
Total weight 360 gr., flight time 10 mins smooth flying or 8 mins aggresive flying.

Update 2016-09-05:
Arm - more accurate dimensions, enlarged hole for cables.
Top plates - more accurate dimensions, added top plate for Pixfalcon controller.
Bottom plates - more accurate dimensions, added bottom plate for 34mm lipo pack, added mounting holes 45x45mm for PX4 PDB with power module.
Landing gear - more accurate dimensions.
Added GPS stand for M8N unit.