Using the fermentor target and the auto calculated post boil values and a manually set Fermentor batch size. When the post boil value is altered the IBU/SRM values remain the same. When the Batch size is modified the IBU/SRM values change. Can you explain please why it should not be the other way around? Why would the IBU/SRM change just because only volume X goes into the kettle from the total post boil volume? Arent these final values derived from boil times and boil volume? Am I wrong somewhere?