Thanks to everyone who responded. I came away with the impression that my best bet was to start with my old times for Tri-X, which was 15 minutes in PMK at 70 degrees (EI 250). But, never being able to leave well enough alone, I decided to use Pyrocat-HD and semi-stand development. So, following Sandy King's instructions, I developed for 24 minutes at 70 degrees, with one minute continuous agitation at the beginning and 10 seconds every three minutes thereafter. The negatives came out just fine. This was 35mm roll film, since both my medium format cameras were down at the time.