Claes. Just one more question. Is your recommended development time of 9 mins for Rodinal based on 20 degrees C? John Welton's recommendation on Ed Buffalo's site is 10 mins at 22 degrees centigrade and this is based on EI 80 instead of ISO125. As exposure at EI 80 suggests that a shorter development time might be better than at ISO 125, this suggests that I should maybe go for at least the full 10 mins which is what you use for RO9 even if this is at 20 degrees centrigrade.
However knowing your temperature will help me decide by how much I should maybe go beyond 10 mins. I think that based all of the above facts I should go for at least 10 mins and maybe 10% more which is 11 mins.