Are you not doing test strips? ie. 2, 2 , 4, 8 sec. which would equate to 2, 4, 8, 16 sec total exposure to get you in a stop of the desired exposure then additional tests at the grade you want to use and smaller exposure changes 4, 2, 2, 2. which would give 4, 6, 8, 10 seconds total .
With...