Add option to output fixed datum vertical offset to output formats. Now it is troublesome to align models as not all softwares or cloud services support geoids. What is needed is simple output in GCS metadata of specific offset for model without need to provide geoid grids(GTX). Much simpler approach.

VERT_CS["Fixed Offset",VERT_DATUM["Offset Value 3.155 m",2005],UNIT["metre",1,AUTHORITY["EPSG","9001"]]]]