This reminds me of a time in training on blue print machines outside of Chicago many years ago. There were two machines being worked on by two teams of two per team. One team felt it was a race. My team partner was more like me feeling our time should be taken to learn all we could dismantling and rebuilding the machine. Of course they finished rebuilding their machine before we finished ours. One problem, their machine didn't work properly.
They had put a clutch gear in backwards. My recollection is we saw this coming back from lunch, shook our heads and chuckled. The clutch gear was so one roller would only turn in one direction. The roller wasn't supposed to turn if the machine was in reverse.
Oops! They tried the machine in reverse and had a big problem.
In typing many years ago the instructors would stress accuracy over speed. The speed will come naturally over time with the repetition of practicing for accuracy. This holds true for many repetitive tasks.
jtk