Hello Dave,
Before starting, make a backup of all files, if you mess something you can restart quickly.
First you must open the file that has the correct location set, usually the architecture file.
Then link each trade, unpin the file, and using the move tool adjust in the plan view the position, you must have some reference point to confirm the position!
Repeat the process on the elevation.
Then on the manage tab, project location tab, select publish coordinates. Select the linked file and select the file site. By doing this, you have set the coordinate systems to the new position of the file.
If you select the linked file in the properties the Shared Site parameter is filled now!
But you still need to update the file!
Open the Manage Links and select the linked file, click on Save Positions, now your file is in the proper place!
Remember when linking the files after this process to use the option By Shared Coordinates instead Origin to Origin.
Repeat the process for each file, I suggest to have one link at time, so it will not get messy!
Fábio Sato
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