RE: GP Easy Sport balance.
I have 3 of these aircraft, best and easiest plane I have ever flown. I made one a taildrager and had to make a larger rudder for ground control. T get all three of mine to ballaqnce I cut a hatch as far back in the bottom of the fuse to get the battery as far bac as possable. By doing this I only had to use 1.25 oz. of lead to ballance ,again in a hatch on the botton of the fuse at the tail.