I've been lucky enough to have my requests fulfilled by Flyingwings. I wanted a center section for my fpv wing - a Yeti wing addition. As from my dabbling in cfd seemed like an interesting thing to try in practice !
(http://s30.postimg.org/umb58z7r1/IMG_20150718_160833.jpg) (http://postimg.org/image/umb58z7r1/)
Basically I wanted to delay flow separation in the center section around the control surface so the idea was to keep the messy, pokey outtie stuff contained.
(http://s11.postimg.org/xks4z46tr/Project_2.jpg) (http://postimg.org/image/xks4z46tr/)
Long story short i just completed a somewhat successful flight with a 3s 8000mah battery bank (yeti recommends 2200mah), which should give about an hour flight which was only possible because the more efficient use of the wing (i like to think anyways)
If anyone's interested in the wing gimme a shout as its easier to make a few center sections at once. Also ive got 3d printed camera shrouds to go with.
.....Sticking the winglets forward also helped further (reduced gliding noise quite substantially)
(http://s8.postimg.org/u6xanpz1d/osprey_1.jpg) (http://postimg.org/image/u6xanpz1d/)
https://www.youtube.com/watch?v=O32dVNEiSY8 (https://www.youtube.com/watch?v=O32dVNEiSY8)