Extruder for Prusa MK3 with E3D Revo Micro and Orbiter V2.0

The same extruder with linear X-rail: https://www.printables.com/model/1122381-mk3-bear-mit-linear-monorail-x-und-y-achse

This is my extruder for Prusa MK3 featuring E3D's Revo Micro and the new Orbiter V2.0.
I'm using this design since 2023 without any problems. In 2025 I replaced the X- and Y-Axis with linear rails. For download I added the complete assembly in step-format. Free to further develop these data.
The Orbiter needs different settings which are all described in the document (attached) coming with the Orbiter. My setting for the Orbiter E-steps: m92 E676.
You'll need to adapt the Orbiter cable plug as shown. I took a spare Einsy cable, cut off the plug with some 50mm cable rest, attached (soldered) 5x0.6mm wire to the ends and shrinked the connection.
I used a 25x25x6mm hotend-fan with a 3-wire lead which prevents problems with the Prusa firmware. It's a SUNON KD0502PEB1-8 which is quite hard to come by. Update: 1. KD0502PEB2-8 (25x25x6.8mm) can be used as replacement. The airflow is a little bit less but it does the job without problems. 2. I did an update on the Pinda attachment using 2 M2.5 screws.  If anyone is interested please ask. (endUpdate) E3D ships a 2-wire hotend-fan (20x20x10mm) with the Revo Micro hotend. For anyone looking for another fan: The hotend-fan needs an airflow-volume of ~1.9 CFM.
In my design I did not add a filament switch. I never used it and in the past it only caused problems.
If you need a filament switch you could use a tube integrated filament switch and so add the functionality outside the extruder. https://www.printables.com/model/275865-super-simple-filament-jam-and-presence-sensor-inli
For the 3 main structural parts (x-carriage/x-carriage-back/adapter RM-Orbiter 2.0) I used ColorFabb PA-CF because you need optimal stiffness here. For the M12x1.5 thread in the Orbiter/Revo Micro-adapter it's advisable (at least for PA-CF) to use a cylindrical speed modifier area (PrusaSlicer) around the thread to reduce the speed locally to 12 mm/s. Layer height for PA-CF: 0.2mm/0.4mm nozzle(X).
Other filaments: Extrudr GreenTEC PRO (print fan shroud, hotend fan holder, Pinda mount). This filament is quite heat resistant. For the remaining 2 parts: PLA.
There are 2 parts with 0.25 nozzle/0.1mm layer height: Hotend fan holder and Pinda mount. The remaining parts use 0.4mm nozzle/0.15mm layer height . Supports only for: print fan shroud (3 air exits), hotend fan holder (arc) and My pinda mount2 (Petg, extensive supports, difficult postprocessing :-(
Update 02.12.2023: Pinda-position corrected (gregsaun/prusa_i3_bear_upgrade#142).
Pinda-adjustment improved (https://www.printables.com/de/model/227763-superpinda-precision-adjuster-for-prusa-i3-mk3s).
Tip: Plastic is not metal. Don't overtighten your screws and regularly check and fasten them if necessary. Best check before every print session. 
If anyone needs more information please ask me.