I post this as a remix but this is actually a full rework (I still wanted to give credit to the original author of the Redox keyboard).
This model is called Redox Manuform as the second inspiration came from yet another keyboard design: the Dactyl Manuform. I wanted the Redox layout on a Manuform-like ergonomic design.
I tried and failed to generate a Dactyl Manuform version from the original script as that keyboard is supposed to be parametric so I ended up designing everything from scratch.
This started out of simple curiosity for mechanical keyboards, then it evolved into a fun 3D modelling challenge and it turned out eventually into a fully usable tool that I am now using in my daily life with a custom firmware.
It was a really fun experience! QMK firmware is really awsome!
Apr 10th edit: as requested in the comments, I added the source file. Be warned though that I am not very experienced at modelling so the file is a real mess. I fist tried to declare everything as parameters to keep things customizable (angles beteeen keys, spacing, etc...) but that all turned out for nothing as the outer hull of the keyboard (the more complicated part) is a freeform and will not be uptdated automatically. I guess it is still useful if you want to change small things such as audio jack or screw hole diameters.
No Name generic PLA
Black for the body, transparent for the bottom
I chose not to expose the micro USB on the right side but if you prefer to, just mirror the left model in your slicer...
Support is necessary for the main body only.