CG isn't one absolute spot, it's a range where the plane will fly, If the plans call out one spot,, that's usually the center of the range.
Some people like to fly a more aft CG,, "Aft in the range", typically for a more aerobatic snappy performance,, some prefer a forward CG on their planes, that typically makes the plane fly more stable. It's a personal preference.
Last edited by scale only 4 me; 02-28-2016 at 07:15 AM.