Hi Usagi
Di-Xactol used to be the developer of my choice. I use Ilford Delta films and looking back at my notes, I developed the 100asa for 9.5 mins at 24 degrees and 400asa for 10.5 mins at 24 degrees, both single bath. The sharpest prints I have ever printed have come from negatives from this developer.
However, I must add. if you plan on using this developer with Fuji Neopan, I would strongly advise you not to, as I had a good few films reticulate on me and I never found out the reason why. I just changed films.
Barry Thornton suggests using Exactol Lux for 35mm film and I would advise to go with it. My own personal reason, though not Barry's, would be because of the grain, especially in the sky areas, it was far too prominent for my liking.
One other thing to note. The best , most easiest negatives to print, and by far the sharpest I ever had, was when I messed up the mixing of the chemicals. I mixed up enough chemicals for 600ml of water, but only put 450ml of water in the developing tank. A mistake well worth repeating.
I hope these little snippets of info help you.
regards
Stoo