Peter,
I like the range of tones you got (looking at all three shots). Like you, I'm not sure I like the detail/sharpness rendering as well as I might. I'm comparing it to Efke, though, which I suspect has a higher silver content. Maybe we need to experiment with developers too; Freestyle lists D76 as their first choice for this film.
From Macodirect:
•ISO 100, Supergrain, 1+12, 6 Min., 20°C (68°F).
•ISO 100, R09/Rodinal, 1+25, 9 Min., 20°C (68°F).
•ISO 100, Microphen, Stock, 9 Min., 20°C (68°F).
•ISO 100, D-76, Stock, 9 Min., 20°C (68°F).