Prusa MK4 Filament Guide for PTFE Fitting

Useful for feeding filament from dry-box or dryer.  

Remixed from the original mk3 design.  Increased height between printer frame and forward angle to eliminate collision with the MK4 extruder carriage, and revised the “clamp” to be tighter using the Prusa filament guide as reference.

* Updated 2-MAR-2024:   Added “Tall” version, which is 40mm taller than the original.  For very tall prints where the print head gets near its full height (Z=221), the original design only leaves about 25mm clearance which can result in a sharp bend of the filament when the print head is far left or far right.  This new version, if you have the additional 40mm vertical space for it, minimizes that issue.  

* Updated 18-SEP-2024:   Added a “Tall-Secure” version.  Rather than a “snap-on” mount, this version uses a two-part clamp with (2) M3x10 or M3x12 socket head screws and (2) M3 nuts.  Most people find the snap-on mount satisfactory, but this two-part clamp eliminates any possibility of the Guide getting pulled or knocked off of the frame.  For this version, print both the Prusa MK4 Filament Guide Tall-Secure_Main.stl and the Prusa MK4 Filament Guide Tall-Secure_Clamp.stl, then refer to the Prusa MK4 Filament Guide Tall_Secure - Instructions.pdf for assembly tips.

Changed to provide clearance for MK4 toolhead, which collided with original MK3 design, and reworked the attachment to be more secure.  Added Taller version for more clearance, and added two-piece clamping version of that Taller version.