I was wondering if someone could help me, I am planning on developing my first slide film and have bought an Agfachrome process 44 kit. My question is regarding the first developer time...the directions say 5-7 min and I am assuming it is not a random choice of time on my part. What first developer times have people been using with Fugi Provina 400 film? The directions also state that the developing time should be increased 30 sec for the 3rd roll of 35mm and another 30 for the fourth. I would like to develop 2 120 rolls at once (in a Paterson tank) and wonder how I should go about increasing the time?

Any help would be appreciated.