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Just took similar design changes from the mod and applied them to the R6 extruder assembly. This allows the user to use the new MK3S+ hotend with the shorter PTFE tube.
Tested and implemented on 1 printer currently, running without issues.

Features are just plugged from the original:

Features:

Pass thru ptfe tube (3mm ID 4mm OD) Almost all the way to the gear.

Side window (for cleaning, watch and understand the filament feed)

It feeds almost all kind of tips.

What you need:

PTFE tube 3mm ID 4mm OD

4mm Pass thru couple

https://www.amazon.com/gp/product/B01IB81IHG/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Assembly:

Printed in PETG (No support)

The same that prusas manuals.

Make sure the PTFE tube rest in the proper place.

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MMU2S Extruder MOD R6

Model files

extruder-motor-plate-mod stl

extruder-motor-plate-mod stl

extruder-body-mod stl

extruder-body-mod stl

Model origin

MMU2S Extruder MOD feeds almost any tip / NO jams (For me)

License

extruder-motor-plate-mod
stl

extruder-motor-plate-mod
stl

extruder-body-mod
stl

extruder-body-mod
stl