I'm using 4x5 fp4+ and processing in D76 1:1 and also Ilfosil S 1:9 and am getting consistantly thin negatives with both processes. I used the Massave Dev Chart from digitaltruth.com to get my processing times for both. When I process 35mm with both I get great results. I shot the same scenes (metered handheld on both) with the 35 and the 4x5 to test they all get consistantly the same thin results on the 4x5 only. I assume this means I need to increase development times and the advice I've been given were to increase 15% and increase 10% from 2 different people. Just wanted to get more opinions or see if anyone has had any direct experience with these 2 combinations.