Ivaness, I do not want you to think you have to do leadpipe exercises as the only way for you to develop aperture corners. Harmonic exercises are the basis for developing trumpet superpowers.

I am writing to underline the importance of your developing corners by using harmonic slurs. I confess this has never been a routine of mine. I mainly used the tongue when slurring intervals and not the aperture corners. I used harmonic slurs as a tongue exercise. I also used extra pressure to change notes as I ascended. I am using harmonic slurs to break these bad habits. I am learning to use my aperture corners. We need to practice aperture corners and not worry about other techniques at this point.