In my experience Diafine always produced flat negatives. It is in fact one of the reasons I switched all those years ago to using Pyrocat-HD. I wont be surprised to find that any other divided development process will reveal the same issues with density that Diafine does. After all, how many people tell of using Diafine to 'rescue' an over-exposed negative ?!

The other reasons for using Pyrocat-HD for me was the long shelf life, the cheap costs and the staining / tanning effects. If a divided process is using concentrations at 5 times the usual then I will not be able to use it I'm afraid for the cost factor.

However, it has been a useful discussion.