To my surprise, the teacher said I hadn't made any mistakes, and that the only problem he can see is that I am not playing loud enough.
I avoid all kinds of strength excercises, and I already feel that my fingers are getting more delicate and can move faster). But my teacher's point of view is very different. He basically forces me to play louder, beyond the point where I can keep my hands relaxed.
.....even the best pianists tense sometimes, and that I need to learn to deal with it (which to me sounds like "you need to learn to play with the tension, just in case you tense during a performance")
So, is he right? Should I really go beyond the point where I can play relaxed? I mean, I'd really like to play louder (my forte sounds like his piano), but I just don't feel comfortable when I try to.