I have a Photographer's Formulary WD2D+ pyro kit that I want to try on some Chinese ERA ISO 100 4x5 film(when the mailman delivers it). My question is this: The instructions call for a pre-soak/ pre-bath and the use of a wetting agent. Their suggestion is Formulary Forma-Flo or Edwal LFN. All I have is Kodaks photo-flo, but I thought I had read somewhere that you were not to use Kodak Photo-Flo with WD2D+ for the pre-bath. Can somebody help me out on this one? JohnW