I designed this filament guide to serve as an anchor point for a 4mm PTFE tube running from a filament drybox to clamp directly to the center of the top of the frame of my Prusa i3 MK2S.
V2 adds a riser for the PTFE port, so it won't hit the extruder at maximum height. That isn't really an issue for 99% of prints, but it tends to be if you raise your Z to the top for maintenance tasks (don't ask me how I know).
There are three versions of the file:
M10 - This one has a threaded hole to accept a PC4-M10 Male Straight Pneumatic PEFE Tube Push Connector
Also included a version with custom supports because it's difficult to add supports with most programs that won't add supports to the M10 threads.
4mm Hole - This one just has a 4mm hole you can use to shove your PTFE tube into, or you could use this one as a normal filament guide
Solid - Not sure why anyone would want this, but you could theoretically print it and drill your own filament holes in it should you desire to do so
The author hasn't provided the model origin yet.