I have a P-51 with a Saito 100 in it. It has mechanical retracts in it and on occasion I have to go inverted to get them to go up. I was wondering if the battery I am using has enough amperage or if the servo may be just weak. The battery is a 6v 1600 Mah. Is that a strong enough battery for mechanical retracts? I have put a 2300 Mah 4.8V in it and there is very little difference if any the 4.8 may work a little better but still slow when coming up.