Viewport.PaperToModelTransform not projecting as expected

I am trying to take a viewport and essentially take the viewport extents and do a “chspace” command to push the viewport into model space. I have found what I think I need to do this through viewport nodes, but when I try to project the viewports center point as it is in paper space into model space the center point isn’t what I would expect.
This is what I want the center point to be based on using “chspace”:

But this is what Dynamo is giving me:

Screenshot of my Dynamo script as it stands:

Hi @jbrunkhorst,

Which version of Civil 3D are you using? We fixed some issues with these nodes in Civil 3D 2026:

Ah, I see. We are still in 2025