Whew, well, just got home.
It appears that with a grade #3 filter that 18 seconds will give me…
1. Subtle steps between Zone V and II but that beyond that it goes to max black.
2. Subtle steps between Zone V and just a touch of tone on VIII but white after that.
Using a grade #2 filter…
1. Subtle steps between Zone V and Zone 0. Then it goes to max black.
2. Subtle steps between Zone V and Zone VIII (just a hint of tone at VIII you understand) with white after that.
So it would seem that I need to cut my development time by I think 30 seconds more to truly come into the #3 filter zone. It also seems to me that now that I have a “master” roll of negatives for a #2 filter I can go to any school and shortly after calibrate my film to that enlarger. The same would be true for paper if I were inclined to change (which I’m not but just theorizing).