This is a great forum with active, helpful people. I'm sure glad I joined.
Thanks again for the ideas. These two rolls aren't *that* important but I'm leaning toward the idea of putting the longer-timed one in first, then after a minute, put in the other. :-)
I've done that to... again from experience, in the end I usually regretted it too.
I find T-Max works best with T-Max developer.
HP5 and Tri-x with Rodinal or D-76
Ilford Delta films with the recommended developers.