Hello Bill,
When you have time for a 2.1.0 pre-release, check, if metadata.xml file (can be optionally enabled in Export Model dialog) resolves the requested problem.
The file, if written, would contain the information about the model origin in geographic coordinates (if the model is referenced) and also shift values that will be automatically considered on import. See the example of such file below:
<?xml version="1.0" encoding="utf-8"?>
<ModelMetadata version="1">
<!--Spatial Reference System-->
<SRS>ENU:69.19433256061115,51.27974765884</SRS>
<!--Origin in Spatial Reference System-->
<SRSOrigin>1000,5000,-100</SRSOrigin>
<Texture>
<ColorSource>Visible</ColorSource>
</Texture>
</ModelMetadata>