Video test flight time on 4s5200 battery: http://www.youtube.com/watch?v=C2KGjQfINZU&feature=youtu.be Beer for me)) :https://www.redpah.com/product/2469/copter-piratMultistar High Capacity 4S 5200mAh: http://www.hobbyking.com/hobbyking/store/__56840__Multistar_High_Capacity_4S_5200mAh_Multi_Rotor_Lipo_Pack.html Afro Slim 20Amp Multi-rotor Motor Speed Controller: http://www.hobbyking.com/hobbyking/store/__42551__Afro_Slim_20Amp_Multi_rotor_Motor_Speed_Controller_SimonK_Firmware_.html 2216 Multistar motor: http://www.hobbyking.com/hobbyking/store/__74759__Multistar_Elite_2216_920KV_Multirotor_Motor_Set_2xCW_2xCCW_.html Brass Knurl Nuts M2.5*5mm(L)-3.5mm(OD) Metric Threadedhttp://www.ebay.com/itm/100pcs-Brass-Knurl-Nuts-M2-5-5mm-L-3-5mm-OD-Metric-Threaded-/290970662223?hash=item43bf33f54f