I assume that the stepper motors for this printer use 0.04mm increments, or something. The instructions say, "For best results, set your layer heights in 40 micron (0.040 mm) increments. For example, 0.16mm, 0.20mm, 0.24mm etc." So I'm just trying to make the Cura profile match that.
I hate to experiment with profiles, because my experience has been that a badly-written profile is a good way to completely screw up my Cura settings and have to start over. But, until the printer mfr decides to produce updated Cura profiles for their hardware, I guess that's where I am.