Recommended Hardware Mods

MK3S MK2.5S Extruder with Optional BLTouch v3

I also highly recommend if you're NOT keen on the EXTRUDER TOWER to check out my design being released alongside this firmware version.
TZB MK3S:MMU2S Extruder with Optional BLTouch v3

MMU2S Filament Buffer

If you're also having issues with all that retracted filament I've re-imagined the TNDave Filament Buffer with my own modern CAD wizardry.

TZB MMU2S Filament Buffer

MMU2S Selector M10 with Magnet Assist

TZB MMU2S Selector M10

MMU2S Dual Blade Selector

MMUS2S Dual Blade Selector by 3dMonster