This is my most clean build thanks to BRF3 and BRPDB combination. The only downside I see is presence of JST SH 1.25 connectors on FC which leads to soldering thin wires from receiver and vtx.
The Turnigy 3S 1000mAh battery is bit heavy but it's the only I have right now. I plan to use Turnigy Nano-Tech 3S 850mAh.

One of the motors died (broken windings wire) so I replaced the motors with Emax RS1306 3300kv. They are very powerfull. I love them.
I currently use XF Power 850 mAh 70C 4S battery. I do not believe it is 70C. Full throttle and voltage drops rapidly. I will be testing 4S XF Power 550 mAh 70C. I do not expect better performance but less weight.