Even though I've been developing film for years, I've always had questions as to when to stop the clock regarding film development. For example, I just processed a roll of Ilford Delta 100 in Rodinal 1:50 for 14 minutes (20 celsius). I stop the development clock the moment I pour the chemical OUT of the tank (14 minutes in my example). Other folks tell me that the development clock should stop when you pour IN the stop bath (which means I should pour out the developer at 13' 30" and add the stop bath at the 14 minute mark). I'm curious as to what you folks are doing.