If you want to intergrate graphics between models then why not use referencing and copy into the active from the ref file then detach the ref file?
this will bring it into the exact same coordinates. Isn't it much more work to open the source file/ model and copy from a common point then open the destination model and paste it.?. this is an autocad work flow probably because most autocad users cant use the ref file copy element approach the same way mstn users do.....and because acad has the copy by insertion point so some acaders cant break free of that work flow mind set...