First off, .057 is the latest recommened version for lathe.

What exactly are you trying to acheive with the pulley ratios?
Unless you are actually using different pulleys/ratios, then just set them at 1:1.

The spindle calibration doesn't work, and hasn't for a good while, so you just need to tolerate speed discrepencies, unless whatever controller/spindle control board has any adjustments to tweak the voltage v speed.
Mach Lathe does do the job, but it does have various quirks, and pretty much highlights why Mach4 is pretty much a complete re-write.