I’ve gotta know what the conversation with the wife was like. Is she also an Evangelion fan? Did he just float ‘Rei’ as a unique name?

Some stuff that immediately comes to mind

• FreeCAD might be too resource intensive
• OpenSCAD maybe a bit of a learning curve for more complex designs, but can be used for simple stuff
• Tinkercad online basic 3D design
• Cura slicer I’ve used (in windows) and it seems fine
• PrusaSlicer
• Slic3r