Next up in the Kopprasch Etude Series is No. 12.

This etude is pretty straight forward, but one tip would be to pay attention to the Allegro moderato marking and stay somewhat conservative in your choice of tempo.  For me, somewhere around quarter=92 was plenty fast, and I was able to get pretty good clarity on everything.  As you work on increasing the speed, make sure that you can play the last six measures accurately before bumping up the tempo.