My planned build is the S900, A2 with Lightbridge, iOSD MK II, BMPCC HD Gimbal and camera. I am planning on using the Troy Built 15,000mAh 6S lipos. My S1000 with the same equipment and heavier lipo is at 21 points AUW. I am not sure if I can get down to 7kg. That is a big difference.