So I found a copy of Keepers of Light, and started reading and came across the section on glycerin development of platinum/palladium prints for contrast control. Know I have seen a couple of other reference along the same lines, but was wondering how many plt/pld printers here actually use this form of development and what type of success you have? Would love to hear any hints, problems etc. or if there are better ways today and that is why it is not mentioned. Thanks in advance. ps - Oh, almost forgot what impact does this form of development have on gum-overs?