What speeds did you use with the films?
I get good results with:
Neopan 400 @ 400 ASA - 14 min.
@ 800 ASA - 18 min.
(new) TriX @ 800 ASA - 16 min.
(have not used it at 400, but guess it would need about 11 min.)
(always with 1+1 dilution, 20°C, 1 min. constant inversion, and 3 inversions at the beginning of every min. afterwards; I use a color-head enlarger with very soft light, and can usually print with about 20 to 40 M dialled in - which would be grade 2.5 to 3, I guess)
Roman