While in Seattle last week, I was fortunate enough to visit Espresso Vivace for a shot (or two) of their fine coffee. Espresso Vivace was founded by David C. Schomer, who authored Espresso Coffee: Professional Techniques, one of the most in depth books on the art of the espresso pull. (Note: I read this book, but only understood about half of it; the other half almost gave me a PTSD flashback to college chemistry.) I’ve wanted to visit Espresso …