Revised Battery Tray (V2) to hold two 3000mAh 3s (25c) Lipo Batteries

Ok, so after some tweaking:

1) Added velcro retaining strap hold-downs each side for velcro strap across the front to hold batteries in place during aggressive flights

2) Chamfered end hold-downs to reduce interference with leg mounts

3) Deleted pre-drilled holes on rear end to facilitate drilling and mounting to fit

4) Added interior circular mounting ring to fit DJI Flamewheel F550