I have one 5645 on each airleron with H9 prolinks.I also put cross braceing in the airlerons the stiffen them up and add 8 ca hinges each airleron.I have 5645s on each elevator half with H9 prolinks.As for the batt. i was doing good until i put the true turn spinner on then i had to move the batt to the tale.So i have ordered a lighter spinner form airwild.