Peon320 - Battery Compartment - Additional layer

Here is an additional layer to add to the awesome Peon230 by Tech2C.

I created a mount for a Chinese action cam see here [Chinese Action Cam Mount](https://www.thingiverse.com/thing:2791787) and needed some extra space for a large LIPO at the back.

Camera (they will all fit):
- eBay: https://goo.gl/jLNaX5
- Amazon: https://goo.gl/qAaF5d
- Gearbest: https://goo.gl/bW6j4R

My drone's exact specification:
- Power Distribution Board: http://amzn.to/2HaxRBc
- 30A ESC: http://amzn.to/2H8Usht
- 2300KV Brushless Motors: http://amzn.to/2o53nbc
- Props: http://amzn.to/2spt23s
- 2 x 3S Lipo 3000mAh: http://amzn.to/2EWFIBu
- 8mm Damping Ball: http://amzn.to/2HaIp3o
- 64GB SDXC up to 100MB/s SD card: http://amzn.to/2Cfd5g8
- FlySky Transmitter & Receiver: https://goo.gl/viRtFC
- F3 Delux Flight Controller: https://goo.gl/RF5Qd8
- FPV 700TVL Camera (32mm): https://goo.gl/oSXvtQ
- FPV Transmitter: https://goo.gl/tdbvoN