Chuck I've used Ilfosol-S and the Ilfotech developers like LC-29. They are quite energetic like Kodak's HC110. You could try a pyro dev. but do wear gloves if your tray developing as it's quite toxic. Pyro responds well to the more frequent agitation of tray developing. And I feel is better suited to N-1, N-2 development without loss of shadow detail that hovers around zone II. However I have had good results with Ilfosol-S and 4x5 Delta 100 by diluting the dev. 1:14 with a N dev. time of 7min. Also you may like to consider Ilford's DDX dil. 1:4, again 7min. for N dev. Good luck,(posted 8715 days ago)