1) Enter total Z height (under object property scaling)

2) Enter Z-offset after centering and aligning model

Instructions to splice your model in half:

1. Set Z-offset to {{vm.zOffset1() | number : 2}}
   ({{vm.centeredZOffset}} - ({{vm.totalZ}} / 2))
2. Export 1st print file.
3. Rotate on the Y-axis 180 degrees
4. Set Z-offset to {{vm.zOffset2() | number : 2}}
   ({{vm.centeredZOffset}} + ({{vm.totalZ}} / 2))
5. Export 2nd print file.