as an engineer and someone who doesn’t drink coffee, I got my wife a chemex and a kettle, then make coffee for her every morning. Time is the same for one cup or 6 cups using pour Over. Process is pretty exact, x grams of beans per X grams of water, temperature set to around 200f. Use 205 now, but used 199 in Colorado as water won’t reach 205. My brother roasts coffee or I use loyal (cos) or black powder coffee. Fresh grind with a burr grinder.