In a fit of tax time procrastination, I have updated my residual alkalinity spreadsheets on my webpage, http://howtobrew.com/section3/chapter15-3.html
Version 2.0 improves the user interface and adds (gasp) instructions! mg:
It also (unfortunately) fixes several small errors I was unaware of until Dave Louw and Soren Tygesen pointed them out. Thanks!
The new version also incorporates dilution with distilled water.
Have at it and I hope it is helpful.
Good Brewing,
John