foldable hexacopter

this is my first hexacopter. since it is pretty big i made it foldable so it can be carried around more easily.
the hexacopter was designed in creo elements express (free cad software from ptc). the design file is attached.

more pics and infos here:
http://www.muellerr.ch/folding-multiwii-hexacopter/

here's a video of the maiden flight:
http://youtu.be/9m2nQKVgnvs