Does anyone here have experience with Rollei's Paul & Reinhold 640? Developers, development times etc. The Massive Dev chart only seems to mention Xtol, Rodinal, and HC-110 dilution B, D76, Pyro 510, Bellini Hydrofen, XT3, a couple Rollei developers, developers I have never heard of before, and developers I don't think they make anymore. I get the feeling hard data on this film is thin.