OK. I was asked to post my results so here goes. Keep in mind, these numbers work for my paper Kodak Polymax with an ES of 1.01.
TXP320 with Rodinal 1:50 at 72F (tubes filled to cover film while standing)
I used Distilled water at 72F with plain water as a stop and 5 minute prewet with distilled water
agitatation was for 15 seconds to start then 10 seconds each minute. Nice and gentle agitation.
N-2 4:08 with an Effective Film Speed of 100+
N-1 5:20 with an Effective Film Speed of 125-
N 7:45 with an Effective Film Speed of 125
N+1 11:15 with an Effective Film Speed of 160-
I ran a couple of test shots and they came out perfect. They called for N + 1/2 development. (SBR of 6-1/2).
Hope this helps somebody.
Bob