Prusa i3 MK3 MMU2 filament holder and buffer (top load)

https://youtu.be/cYleyNNw3mU

https://youtu.be/iYWhzs_4uD0

I really like the new MMU2 (MMU2S) upgrade for Prusa i3 MK3(S), however I hate the filament holders and buffer. They are very unpractical, difficult to access, and long curved PTFE tubes are bad for many filaments (high friction for any filament with slightly rough surface or non-slip surface, for example most filament with wood or other additives and flexible filaments).

I created my own version of buffer and filament holder, re