PRUSA i3 MK3/4 PTFE tube holder for filament routing and reverse bowden

This is a PTFE tube router for the MK3 / S / + and MK4, that allows you to use a dry box or a separate spool holder on your desk.

It spits out the filament pretty much where it would come out of a spool mounted on the stock filament holder (and mounts to the frame in the same way), so no problems with the extruder hitting or interfering with it while printing tall stuff.

You can also use an xacto knife or box cutter to remove the little lip in the second hole, pass the PTFE tube through and use it as a simple tube holder for reverse bowden that doesn't interfere with printing! I use it in this way, as it reduces stresses on the print head.

Print it without supports, use a good quality tube to minimize friction... and that's it! it's a pretty simple print, really!