I know all of the measurements by heart. I can't tell you the exact length it takes to string a 16 main babolat on my machine besides that it is 3 1/2 measures of my wingspan. Kblade 98 is 3 and 3/4. 19 crosses takes 3 and 1/4.... and so on.
From my experience the best way to learn and get faster at these things is... Experience. Redundant aint it?
"I knit with fence wire for a living" .... its as exciting as it sounds.