I wouldn't use Rodinal with Delta (or any other t-grain film). It doesn't seem to bring out the best in this film.(posted 8801 days ago)I haven't yet tried it, but PMK might be worth a shot. Failing this have you tried good old ID-11 / D-76 1:1 or 1:3?
Ilfotec-DDX might be worth consideration too. I've bought some but not tried it.