Glyphs default PS hint settings

Does Glyphs build in the default values for
or should they be manually set as Custom Parameters, even if the default values are required?

The defaults are:
blueFuzz = 0
blueShift = 0.007 * UPM
blueScale = 0.037

Why do you set blueScale to 0.037?
The Type 1 spec says the default is 0.039625.
Has this changed?

For some reason I liked that better. I did that 10 years ago.