This is a fork of Zruncho's Zeropanels for 2020. I have the CAD file posted to my Github here: https://github.com/OneHotTake/ZeroPanels-2020/
Orient as shown in the image, use brim if necessary for adhesion. 3 outer layers, zero infill seems to work just fine for me.
Since it was a mod, I left the magnet holes, but I think they are terrible with heavy doors, so I used screws. If you have a better design, feel free to commit to my GitHub repo!
The author remixed this model.
Completely redone for 2020 extrusions