I have been developing for about 3mins, but would probably develop a little longer with a pre-soak. My decision to use D-72 was expedient in that my mixed Dektol was beat. I read in the "Darkroom Cookbook" that adding a couple of cc's of 10% KBr would increase the contrast in cold tone paper and thought it might help with the DUP film. Will try the press-soak and see how it works.
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