I have been practicing rhythm changes like this. On each three note chord playing 1 3 5 3 one note per beat and on each four note chord 1 3 5 7 one note per beat, repeating for two bar phrases. I am extending this to the different keys C, Bb, F etc. The slurs seem to help my technique plus, I am learning the infamous chord change. Sometimes, during the bridge I sharp the root to get that nice diminished descending sound. I also practice the melody lines. Two questions: 1) I am still so slow compared to the melody, is there a good way to speed these up. 2) People would seldom play those chords on trumpet as they are, what is the next step to jazzing them up?