Hi Tseng,

thanks a lot , I prefer Futaba 9650 for ailerons because of its weight ( just 25 gr. each) and its really powerful for fai style flying and snaps too.. I fly more then 50-60 flights with these servos and no problem..
For the battery capacity 850 mah again because of weight and I charge on the field or change with spare one every 2 flights.. 10 min. flight I check and found that 300- 350 mah energy is need for digital servos.... 2 flights 600 - 700 mah and still 200 mah spare and good enough for landing BUT weight of battery much much less then the bigger ones

I really love this plane and the best part of flying is landing!!.. stable and amazing slow landing capability without stall tendency...

If anyone looking for a new plane '' highly recommended''... On the market I can see a lot of different planes ( europeans & chine models) but the most advantageof this one you do not need to buy anything additional to finish it ( except paint& monokote) ...

happy landings..

oscar