MMU2S buffer upgrade

This is a modified segment of the MMU3 buffer for use on the original MMU2S buffer without using any components other than those supplied with the MMU2S buffer. You still need to print the other original parts for the MMU3 buffer, which I have only uploaded in a .3mf file but you can also find them on Prusa Research on Printables. 

The only thing I modified were the segments, the 2 halves are joined and the holes for the PTFE tubes are modified. By doing this I achieved the mmu2s buffer improvement without using any parts other than the original. You can slide the filament wheel into the segment from the back. Of course since this wheel is bearingless it will spin harder but after testing the wheel works as it should. For proper rotation of the wheel it is necessary to clean the inside of the segment from the supports!!! You also need to print other original parts for mmu3 buffer that i did include only in .3mf file.