Quote Originally Posted by jdef

I use 510-Pyro with reduced agitation for Freestyle APHS Ortho film, at 1:500 for 20min, with one inversion at 1/3 and another at 2/3 dev. time. Works great. Andre` de Avillez has used the same, or similar technique with good results. I haven't tested the technique with TMY, so I can't recommend times or dilutions. Good luck.
Wow. 1:500. Sounds awfully dilute. That doesn't seem to work with Pyrocat very well, but maybe 510 is different.

I think maybe I'll test with some 4 x 5 film first. I have a lot of it.