My calculations show the neutral point, power on, at 46% MAC. So, for a 10% static margin, you would set the CG at 36% MAC,or 8.5 in back from the leading edge. Although I would recommend 10% margin, a 15% margin would be a CG location 7.3 in back from the LE. Once you are used to the plane, you can move the CG to 5% static margin, at 9.6 in back and then slowly move back to neutral if you want a pure aerobatic setup.

Yes, once you have the shape of the plane analyzed, all you have to do to set stability is move the CG, assuming the anaysis shows it to be a reasonable airplane. These are all reasonable nembers for this plane.

With the tail area being 20% of the wing area, and a relatively long tail moment, the airplane should be well damped in pitch and should be pretty easy to fly with a near neutral CG - that's why I wouldn't recommend more than a 10% static margin. Just test fly with a mild setting on elevator travel /low rate.

PS show us some pics or plans or something. We've earned it.