"Red Duck" First Take Off of a fully printed flying wing.

My intention was to design a plane up to 3 m wingspan without strengthening by carbon tubes - that means 100% printed.
But I had to stop at 1,35 m because the wing reached already a weight of almost 1,1 kg. My small motor which I used already on my sail plane http://www.thingiverse.com/thing:86982 wouldn't last for much more weight.
Additionelly I thought a flying wing would make less problems to get the CG forwards, because of the short tail. But again I got the same trouble. The big ma