i have to agree with Rock on all accounts here.......i just flew my Skybolt 2 weeks ago and once i set my CG back to almost 5", the controls (set at default) came alive. it felt sluggish at first at the suggested CG. now it flies, and lands like it's a trainer with attitude.
i don't think 2 planes alike will ever perform the same at the set CG unless all things are equal such as stab wieght, rudder wieght, etc, and incidence and thrust are identical.
CG's are a critical final adjustment.
experiment with it, but just don't get carried away, especially when moving aft of the starting point.
my spins were also sluggish at the orignal setting, but now it spins with ease.