Oof, I feel your pain. It’s especially annoying when the customer doesn’t understand the issue and already had unrealistic timeline expectations lol
Discussion
Even worse when you’re the carpenter and the customer 😬. I finally accepted the fact that “this shouldn’t take me long” is a faint hope at this point. My wife knows to not even ask how long something takes now. I spent 4 good hours on this header because it had to look seamless, not just “good”. Still have finishing work, but it turned out amazing! 
Aw hell yeah, once you caulk that it’ll be a beaut!
I had to relearn tolerances when I started doing carpentry-type work. I had taken a machining class in my teens so my brain still worked in thousandths. Took me until the last couple years to recognize when I need to actually worry about that 1/16 vs when it’s okay to not worry about 1/4” lol