Tom,
Another choice brought from the old past is a developer researched and considered by Altman and Henn as the maximum practical limit of high acutance. It was called AH18. They compared with D76 1:1 acutance. AH18 was 40% superior.
Metol 0.25 g
Sodium sulfite 10 g
Sodium metaborate 20 g
Water to make 1 liter.
My std for Tmax100 is 15min 20 C EI 50
Really good