Here's a 4x5 neg exposed on overcast day @ ISO 200. Developed in Rodinal 1+50 in tray by inspection. If I remember correctly I had to leave it in for about 9 minutes. It produced a very printable neg. This is contact printed on Find Art Photo Supply Perfecta paper, developed in glycin developer.
I liked the film, but I'm allergic to it's scratching propensities. Maybe in pyro, which hardens the emulsion. This would also help hold the highlights back on a sunny day. Seems like you're about to figure it out with the Rodinal, however.
- Thom