Well I finally took the plunge and moved from the EZ Water spreadsheet to Brun' Water. It is clearly more complete.
I am wondering about Blackprinz Malt since it is 'bitterless' malt. I added it in as a roast malt @ 500 L, but since it is bitterless, will it be calculated as adding more acidity to the mash than it actually does? If so, should I categorize it as base malt or what?