Thanks everyone. Three rolls in, and my workflow is now as follows:
-10:00 - -:05 - Place empty (of liquids) Paterson tank in tempered water bath (weighed down; water is ~118F)
-:05 - :00 - Remove tank from water bath and remove lid from tank
:00 - Pour developer (~101F), start timer
:05 - Move tank back to tempered water bath (~113F now)
:05 - :30 - Twirly stick agitation
:30 - :40 - Cap tank
:45 - :47 - Agitate: two inversions; tap tank to release air bubbles
I continue agitation every 15 seconds but only tap again at 1:45 and 2:45. The tank is in the water bath at all other times.
3:00 - 3:02 - Last agitation; do not replace tank in water bath
3:02 - 3:15 - Remove lid, dump developer
3:15 - Pour bleach...
I did numerous dry runs and tested the temperature at various places. It seems to average about 100F.