As a warm-up, and to work on extending your range: In addition to the lip slurs routine, I recommend adding slow, soft major scales, starting on middle F, and working your way up chromatically.
Very nice performance of the Rochut solo for the recital. Keep up the great work with it in the coming weeks. The duet is in good shape, too. Looking forward to working on it more, and to performing it with you!
Nice reading of the technical studies. Have fun with the Blazhevich this week.
See you on Wednesday!