Something I should have mentioned. I notice that you say Rodinal is your standard developer. Perhaps I should have mentioned that I use FP4+ with D76 at 1:1. The developer film combination is very important and I believe Rodinal is an acutance developer (others will correct me if wrong). Rodinal is also an excellent developer and probably my second choice to D76. However, my own experience with it showed it produced slightly better results with faster film.