This is a 20 board 9th key run, after using a modified 8th Key pattern of Don Hodges. I call the 9th key pattern the F-4. It is similar to the F-3 but instead of using the beginning of Don Hodges' Tornado pattern, it uses the beginning of the Slam Dunk.
This was taken from a 50 board run which I timed at 38min 28sec. That would give an average close to 40.3 sec per board.