I have developed a lot of TMAX 400 in Pyrocat-HD and got very good results. Unfortunatley the last time I actually tested the combination was 2-3 years ago and I am reluctant to post those results now. However, I recently bought a couple of boxes of 5X7 TMAX 400 from Clay Harmon and will likely re-test the film before I use it. TMAX 400 is really my favorite sheet film and if it were available in ULF size I would use nothing else.
BTW, the members of the formum should thank Clay for the results I posted on FORTEPAN 400 because he was kind enough to send me at no cost the box of 4X5 film I used for the tests.