I have modified an old (and replaced) Ender 3 V2 with a 4th and 5th axis.
I also wrote an indexed slicer to print in multiple orientations.
Wowwww. That’s an amazing work. How did you code the slicer ? 
That’s the future of 3D printing !
The interface is via the Blender application, I wrote an addon in Python. And the gcode is created via the Cura Engine.
have a look if you wish: