The learning process continues. After around 10 days of practicing, I'm comfortable enough to fly the plane just for fun (when I don't feel good enough to push my skills to the limits). I did manage to find a local 3D pilot who took the plane for a spin. He prooved the pane is truly a 3D indoor/parkflyer beast; just my skills need to catch up with it. I didn't have a camera back then, but I'll try to arrange some sort of show-off demo flight next time we'll meet.
For now, please enjoy the video of relaxing flight of this wonderful "designed by accident" plane:
P.S. As you can see, the plane got a landing gear. Next step - painting...