I use a 150cc of all E6 baths for a JOBO 35mm tank except the final rinse where it requires the stabiliser to fully cover the film with no movement for the prescribed time. I have never had any problem of 'under-cooking' the film with this quantity. For 120 film or 2x35mm I use 250cc of chemicals and get the same result. With the 35mm JOBO I can process 6 films. With the 250cc quantity I will always be able to process 8 films.