I have an Arris 810 Hexacopter (AUW 3620 Grams) with Arris 4010 pro 380Kv motors. With 13x4.7 props on it they have 780 grams thrust at 50% per motor. Running 30Amp esc's and 6S 3300 batteries in parallel. With 15x5.5 props it will have 950 grams of thrust at 50% per motor. I just did the compass dance and did my first test flight and it seems to fly great but it also seems to need a little more thrust also. I"m thinking more in line of the 15x5.5 props for more boost.