Aha.  I like the trick of setting limits to 0 and using "Force Limits."  All I've been doing is hiding the dials.

I model in Carrara, and one of the steps in that program is the much-loved "Normals dance."  For whatever reason, Carrara tends to reverse the surface normals on every other instance or duplicate of a master object (but not always...it's basically random).  So before doing the final split and grouping, I import into Poser and look for reversed normals.  And as it turns out, it is faster to fix them in Poser, too, using the grouping tool.