First layer height measurement - verbose

This is used in the same manner as in the original part:

https://www.thingiverse.com/thing:3293142

However, it has more instructions built in to be more informative without increasing the print time too much. This prints in approximately 30 minutes, as compared to the ~25 minutes for the original.

There is also a compact version that prints in 5 minutes:

https://www.thingiverse.com/thing:3324022