I just finished mine with an E-Flite 360, Castle 160 ESC, 2 x TP 6S 5000 Mah in series. I already had some of these 6S for my Habu. Batteries fit perfect in the top hatch and give me about 6.5 minutes of flight time. Have had 4 great flights. The plane still needed a little weight in the nose & then balanced perfect. Have it weathered now and running a 20x10 Mejlik at 7,500 rpm. What an awesome plane!