Well,
I installed the twin HS81 servos in the tail. Now I have precise elevator movement of both halves. The plane still snaps very easily, in fact, it seems worse. The plane is dead on with lateral balance. As for the CG: I added 4 ounces of lead to the nose and the plane balances at 4 inches back, which is in middle range of the recommended CG point. I also have the battery pack and receiver way up by the fuel tank. Short of adding more lead, I can't get the CG much further towards the nose, although as mentioned its in the middle of the range anyways. This balance point was with an empty fuel tank.

I also checked the thrust line by going straight vertical. The plane tracks straight up without veering off to the right or left, indicating that I probably am good as far as my thrust line goes.

Maybe I need to accept the fact that this plane won't tolerate extreme elevator throws. I guess I am used to my Extreme Flight Yak with 50 degrees of elevator throw. I can give full throw at any speed and the Yak won't snap in the least bit.
Anyways, at this point, i may consider selling the katana as its becoming frustrating trying to figure this out.