Prusa MK4/MMU3 Bufferless intake - EXPERIMENTAL

I have a fairly unique setup where there is a lot of space above my 3d printer with the ability to feed filament directly from above into the hot end, the default MMU3 setup doesn't really support this very well.

I made this adapter which does not need the buffer of the MMU3, you do need sufficient clearance between the adapter and your filament. 

I also cut the tubes as they don't need to reach as far

Designed for my Mk4S but should work fine on the Mk4

WARNING, PLEASE READ

This is a little sketchy as filament can get into places and jam, so far it's been caught in the MMU3s selector and in between the Idler and Pulley motor, to solve this I've taped a bit of cardboard around the top of the MMU3 to prevent filament from getting pinched by the selector (I would recommend doing this all the way around and not just on one end like I've done in the images) as well as some tap to cover the gap in between the motors

Made in Tinkercad with the tube fittings designed by Prusa Research - MMU3 Printable parts

Used the design of the tube fitting on the spool rollers