Manually Exporting Thingworx Entities

I am trying to come up with some tools that give us more flexibility when moving Thingworx entities from one environment (dev) to another (prod).  Currently the best we can do is tag an entity and export based on tag.  However, in many cases we are getting entities that didn't change in the dev environment and we don't want to risk importing something to a production environment that we didn't intend to import.

What I am wanting is some sort of way to select individual entities and then export those entities based on selection.  I found a link to an article about manually exporting entities and I think this could be the basis of the tool we need.  Manually Importing and Exporting

When I attempt to run the URL's listed in the link above to export an entity as XML, I am not getting all the needed information.  I check permissions and I have them set correct, as far as I can tell.

Has anyone used the features explained in the link above?  Any pointers on using that to export the full information needed for an entity?

Thanks