Oginme
Grandmaster Brewer
The way around the issue with the Anvil, if you wish to use the recommendations given with the unit, is to select a BIAB profile and then modify your equipment profile to top off the boil kettle with the amount of water you wish to use in your sparge. This way the software will use the BIAB settings and calculate the total water needed for the brew. It will then subtract the top off water in your profile from the amount it calculates to give you a volume for the mash. You just use that "top off water" as your sparge volume through the grains. Don't worry, the software is not watching what you are actually doing