lets keep beating up this dead horse........basically any aircraft that is trimmed for level flight will climb with the addition of power regardless of the cg location. This is because there is no vertical component of a balancing force to keep the nose from rising.
unless we add downthrust!...... tadaaaa!
I always thought it was kind of goofy to add downthrust... it's basically like adding weight to your aircraft. Props are for pulling/pushing, wings are for lifting.
Why not just accept the fact that an airplane is typically designed for a cruise speed... if you go faster than this, the plane will climb unless you compensate by adjusting your elevator. If you go slower than this, your aircraft will sink, unless you compensate with your elevator.