hdclip,
Since you received a 1066x from Lexar, can you do me a favor and see if you can do 2512x1068 2.35:1 in crop mode? See how long you can record at 23.976 FPS over ride.
I can only achieve continuous recording at this resolution at 17 FPS. Maybe that card can do better at 20 fps.
Also please try, 2048 x 1024 2:1 at 23.976. With a 1000x card I can only get around 50".
Your test could answer if the 7D can still benefit from faster CF cards or weather its already at its peak at 1000x.
Thanks in advance.