After a week off, the Kopprasch project is back.  Like the previous study, No. 18 forced me to deal with my sometimes nebulous mid-low range. I don’t know if you can tell from the video, but I used quite a bit of b-flat horn fingerings down there – the clarity and response were much better for me using some alternate fingerings. Suggested tempo is quarter note = 75-80.  One other tip would be to not worry too much about playing ultra staccato.  Even though it’s marked “sempre staccato,” I think trying to play too short really makes accuracy a challenge.