Originally Posted by rocketman768
I thought so. Wonder why Palmer doesn't care about adjusting the sparge?
Because, except for extremely base or alkaline source waters it's moot. Generally, there are enough buffers in the grain to compensate and, there are measurement targets to look for to avoid tannic extractions.
Very few authors actually make mention of sparge water adjustments. In fact, the concensus is that if your water is extreme then all that is recommended is a pH adjustment to neutral.
However, the linked sheets assumes that not all of the ionic adjustments make it out of the draff thus, adjustments to the kettle are done to maintain the desired profile.
Bobby_M has also been gracious enough to video the set-up based on the linked calculator.