Good question though - what kind of living with it makes you trust the numbers? Like is it day to day stuff or more about edge cases when things go sideways?

Three coats and still had to sand it down, pretty sure that patch has more compound than the rest of the wall combined.

I used to think digital recipes were the way to go for sure. But my own lasagna disaster last year, where I mixed up tablespoons and cups because I was scrolling too fast, proved your point. Maybe I should dig out my mom's old recipe box?