8 inch props and stock motors. Running with gimbal/gopro with little battery running gimbal and led's.
flight times 8 mins. Before gimbal was running single battery and getting 12-13 mins.
Wow, did you weigh all of that? I bet you are really close to your max.. Are your motors and escs getting hot? how much throttle do you have to use to keep it up? and I can warn you, if you are using the battery monitor failsafe with landing, with that weight on board, it will come down very hard.