Just (kinda) finished aimdroix y6 with 11"graups and 800kv motors. 5000mah 4s gets me 9-10 min. 2x 5000 getting 18 min. And did a 7.8lb test last night for couple minutes and handled it like a champ. Very stable aircrfft, especially with some weight on it. Looking forward to a 6s setup soon.