ORIGINAL: nobodytwo
If you want to increase the response of the surfaces just go to a 5 cell (6 volt) receiver pack. Then if you're still not happy change out the push rods to something less flexible. Those plastic rods have a tendency to expand when they are warm and contract when there are cold. Trim never stays the same!
Happy Landings!
Does this really make a big difference? Also I've heard that the 6v battery packs actually give less flying time - is that true? I noticed my ailerons really take a long time to go from max right to max left and was wondering if the 6V battery would make that faster, and what, if anything, would have to be changed to accept the change.