Warning:
This piece is not stock.
It has special dimensions, it needs an adjustment of the selector stop positions, in the MMU2S firmware.
Is this moment I use: "MMU2S-TZB 3.0.3" firmware by TheZeroBeast
Link:
https://www.prusaprinters.org/social/4330-thezerobeast/prints
Link:
"https://github.com/TheZeroBeast/TZB-MMU2S-Firmware/releases"
On "mottion.cpp" line :35
//const int selectorStepPositionsFromHome[EXTRUDERS+2] = {-3700, -3002, -2305, -1607, -910, -100, 0}; //original part
const int selectorStepPositionsFromHome[EXTRUDERS+2] = {-3178, -2479, -1782, -1085, -387, -27, 0} ; // this part
In addition to the remixes named it also incorporates the improvements of "https://www.thingiverse.com/thing:3688458".
The author remixed this model.