Thanks to all who responded to my question. I guess my knee-jerk reaction not to push Plus-X was correct. For the record the pushing "experiment" of TX to 3200 was essentially to teach my daughter what happens in terms of grain when you do that. Sadly, her High School just this year discontinued the photo course which included darkroom basics. So the photo 101 skills have had to be passed on from her dad, who barely remembers most of it and has had to re-learn most of it. Incidentally, the replacement course being offered was not "digital photography", but web design, a sign of the times. Again, thanks Ken Montclair, NJ