Tonight I felt like an incompetent fool.
I took 2 holders with me to my target. 2 b&w and 2 color sheets.
I setup to take my shot, pulled the dark slide only to realize I left the shutter open. Scratch negative 1.
Setup again, pull the darkslde, take the shot, push the dark slide back in and meet resistance. The film popped out of the holder. Scratch sheet 2.
Setup again, this time color. Take the shot, then realize I had a yellow filter still in place.
Onto sheet 4. Finally getting it right.
Ouch. Better luck next time.