Foldable FPV Quadcopter

This is a modification of a design I found on the net somewhere. I wanted to build a foldable Quad for FPV.
Videos can be found here: https://vimeo.com/122620902
The current setup is:
- 700g total weight without Lipo
- Robbe 1000KV motors
- 20A AfroESC SimonK
- 9x5 Graupner eProps
- Naza M lite GPS
Flighttime with
3s2300: 13min
3s5000: 19min
4s5800: 30min (Thanks for GPS Position hold)
I also have some frames left (complete with screws) for 100$ shipped. I hope