See my comment in the original model to find more pictures
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See my other models to have a complete and very usefull chimney :
M2 Insert :
https://www.printables.com/fr/model/593381-m2-insert-remix-for-mk3s-mmu2s-precise-calibration
IR sensor led cover :
https://www.printables.com/fr/model/291962-mmu2s-ir-sensor-led-cover
The author remixed this model.
M8 threaded to add a PC4-M8 as a connector