Show Grids as Planes

I’m trying to make a little Dynamo Graph which will show my Levels and Grids as planes in Revit. I have successfully got the Levels to work thanks to this forum but am having a hard time with the Grids. I would like to project a plane in the Z direction from the Grid, preferably to the height of the Grid extents. See below, any help is appreciated.

SHOW DATUMS

There are many ways to do that, here is one option:

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That worked, thanks!

PreviewGridsin3D Here is something I put together to preview grids in 3d, while dynamo was running.

PreviewGridsin3D throws an error. Error: Custom node definition is not loaded!

The associated .dyf file will have to be provided for the definition to work.