The Pfaff passport utility tray looked great… but I have a Juki so it wasn't compatible… until I made it be compatible. The file also wasn't parametric and extra unneeded vertices so I Was able to use blender to line up the vertices better and get rid of the extra unneeded bend to make it print without needing supports of any kind. If trying to customize yourself, and loading and working from the blender, I don't suggest using the 3d print tool to fix the non-manifold edges as it is easier to use Prusa slicer at the end to fix through the windows algorithm. If needed, I recommend exporting to prusa and back to blender.
The author remixed this model.
It should be pretty obvious. I could have made the stackable box myself in blender, but it is easier this way, the Pfaff passport utility tray looked great… but I have a Juki so it wasn't compatible… until I made it be compatible. The file also wasn't parametric. Was able to use blender to line up the vertices better. If loading and working from the blender, I don't suggest using the 3d print tool to fix the non-manifold edges it is easier to use Prusa slicer at the end to fix through the windows algorithm.