I have developed KB100 in DDX/Clayton F76+. The results were vry good, graininess is a lot smaller than with Rodinal, sharpness ws good, and the tonal range was awesome.
I found that 12 min for 100 and 15 min for 200 in DDX 1+9 was enough, with agitation every other minute.
I had to go check on my daughter while processing one of these at 200, and even though I didn;t agitate in like 15 minutes, I foun dthat 20 minutes was too much

. But the tonal range was extremely long, and my EM-10 (used as cheap-o densitometer) confirmed it. It covered 12 stops.
Xtol should giv you very good results
Flotsam said:
Thanks Ian, It should be interesting to see how the smaller formats turn out. I felt that KB100 in Rodinal came out very nice but a bit grainy for some uses. I'm looking for a finer grain developer for subjects that would benefit from it. I'm a long-time fan of FG-7 and FG-7 in 9% Sodium Sulfite but would like to try Xtol based on comments that I have read on APUG.
I had JandC toss a few rolls of KB25 into my current order and look forward to checking them out in Rodi.