Features:
Splits the world border into a separate instance for each vanilla dimension. These borders can be manipulated individually. This mod operates on the server side.
How To:
Use the command /pdborder while in the dimension you wish to edit to start (or use /execute in (dimension) run).
To set center - /pdborder center (x y coordinates)
To set size - /pdborder size (desired size, measured in the same way as vanilla border)
To get info on the current border - /pdborder get