Z axis not accurate

[Woodcrafter (John Matteson)]

This post has a pic of the HDZ and Z plus.

How to tell if i have a z-plus vs hdz

Hello, i just build my shapeoko pro and i’m trying to connect it. the updated carbid motion software is ahead of the instruction manual, so i’m following a guy on youtube, but that aside I seem to have to select between z-plus or hdz. How can i tell which i have? I don’t remember selecting this when I ordered it.