Actually, I diluted with 15 minutes left in the boil. Took a gravity reading from the kettle, then used Beersmith's dilution tool. Worked perfectly, and I didn't have to worry about sterilized water, or my own, perhaps unfounded concerns that diluting the wort after boil would affect flavor. I stopped the timer when I added the dilution water, then restarted when the boil got going again. Then I added the 15 minute hops.
"Mas vale bolo famoso que alcoholico anonimo."
Join DC Homebrewers
"Fermentation Without Representation"