Quote Originally Posted by PKM-25 View Post
Not entirely, I pre-wet FB when I do 20x24's in my Jobo 3063 drum, it has eliminated the developing streak I sometimes had when I did not pre-wet.
There's always exceptions to general recommendations and it makes sense and has always been recommended by most manufacturers to use a pre-soak with rotary processing.

A pre-soak is also recommended fror colour film processing, more here as a tempering bath to bring the tank/film to the working temperature.