I have only used t-max and sprint developer at school. I am thinking of buying my own developer. I would like to get something that reduces grain size. I understand that Ilford's Perceptol works well with fp4+ and pan f? Sometimes when I've manipulated my development time, or tried to enlarge to 11 x 14, I lose more resolution than desired. Can anyone recommend a certain developer for this purpose? thanx in advance!