Hey all. Not sure if this should be in this section or not, but here goes. I am an all grain brewer and I haven't done an extract batch in 8 years. I am wanting to brew the Firestone Walker Union Jack recipe from Can You Brew It for "Learn to Homebrew Day", extract version. Haven't actually seen an extract recipe anywhere, but have converted the all grain to extract. During the interview, Jamil states that for water they "use reverse osmosis and add back Gypsum and CaCl to 100ppm". As an extract beer, how do I go about creating that profile? I plan to use 7.5 gallons of distilled water for a full boil. I was on ProBrewer's calculator and plugged in 5.2g of gypsum and 8g of CaCl. The result is: 94ppm Ca, 102ppm SO4, and 91ppm Cl. Am I in the ballpark for what Jamil said. Are there any minerals that are not represented that need to be? I find Jamil's comment to be a bit vague, but then again I know very little to nothing about water chemistry. Any help would be greatly appreciated.