"Only things I would add are to chill the gin before making; put glasses in freezer for about an hour beforehand; peel fresh lemon rinds and squeeze oil, not juice, on top of prepared martini; hold glass by stem, don't cradle in hand; make ice cubes with spring water."
Wise words. Also he recommends Citadelle gin in place of Bombay Sapphire. They like it over at Tastings.com.