Before I spend an evening testing for myself, I am wondering if anyone is using a ZoneMaster meter and Pyrocat-HD with multigrade paper, and can comment on whether they had to recalibrate for the differences in color of light vs traditional non stained negatives? What can I expect? different speed for my various "grades"? Different lenght of tonal scale for the different "grades"? I know that theoretically there should be some difference, but it would be nice to hear from someone who has their Multigrade paper already calibrated to non staining negatives, and has tried negatives that have a colored stain. BTW, I am primarily using Ilford Warmtone FB multigrade paper. Thanks!