I shot some Acros (35mm) yesterday evening doing a prom shoot for a neighbour. I don't have a lot of experience with acros/rodinal so a couple of weeks ago I shot a test roll at E.I.50 and based on Chris Wallers advice here, developed in Rodinal 50+1 for 8 minutes. I was really happy with the results. However, last evening, it was quite cloudy and I had to shoot at ISO100. The Massive Development Chart does not give a time for this combo so any advice would be welcome. I was also shooting with my DSLR and using the histogram, I found I was having to overexpose by 1/3 stop. This means that my film shots may be underexposed by 1/3 stop (both DSLR and SLR were Canon with similar metering). Is it worth overdevloping the film slightly or should I just develop normaly and compensate if required when I print the shots? Thanks in advance.