Thrust & CG:It's ben my experience that the farther back the CG the more critical the thrust needs to be - for a great flying plane. The 'pivot point' on the plane, that being the CG, is much easier to pivot, or let's say more noticeable, when the CG is farther back. Look at the extreams; if the CG were near the nose, you would see little nose movement as thrust started to take effect, if the CG were near the tail you would see the nose move very easily as thrust takes effect. Just be aware of this, and the farther back the CG on your plane, the more critical the thrust angle will be.