RE: Overpowering a Trainer
I've learned something from every plane I've had, and I'm sure you will get something out of this experiment.
The one piece of advice I disagree with here is raising the trailing edge. Just use elevator trimraising the trailing edge is no better, and could be worse, since it is equivalent to taking out some downthrust.
Just think about the wing, stab and engine and forget the fuselage and you will see that positive wing incidence is the same as downthrust, once you trim the elevator. And downthrust would be good on this plane, especially with the extra power.
Have fun, and let us know.
Jim