My current e-BIAB system (recalculating) has significant dead space, a little over 4 gallons. I suppose in most systems the dead space is minimal and generally does not impact the mash, but in systems with significant dead space should I include the volume of the dead space in the grain to water ratio? Alternatively, should I separately consider the ratio of grain to total water, and grain to water within the grain holding area? I am trying to determine the impact of having a large dead space and the impact of more or less water in addition to what is needed to fill the dead space. Please let me know if you have thoughts or references that address this issue.