Yet another wing

This is my second wing, and - it even flies :-)
Even a looping, not really round but for the beginning not so bad: http://youtu.be/XIrR3X5ENus
Here is another video which is made by a friend. He added some videos of printing some parts of the plane and some stills of the preparing for the flight - and a wonderfull music that makes you feel as if the plane hovers almost weightless in the sky :-)
http://www.youtube.com/watch?v=ut_Ei22on58

This wing has straight middle sections, so that the carbon tubes can go through. That makes them much more stronger in that section which is especially loaded.
Here affects the maximum bending moment.
I pushed this problem more to outside, where the bending moment is much less.
I designed new wing sections for those critical points. It has a structural infill that makes this parts much stronger and even pretty light.
The wingspan is 1600 mm, 50 mm more than my first wing which I published before: http://www.thingiverse.com/thi