Forgive me if this is a basic question. I just got a new developing tank and on the bottom it indicates that I should use 650ml of liquid if I am developing two reels of 35mm film. I have reverse engineered the HC 110 data to determine that approximately 6ml of concentrate should do one roll of film. So am I correct in assuming that the most economical use of the developer would be to use whatever dilution gives me 650cc with at least 12ml of concentrate? And if I want to use the unofficial dilution H (1:63) I would need to use at least 768ml of liquid in the tank, is that correct?