Add Revo Nozzle Holder

README.md

@@ -135,7 +135,7 @@ This Bear Frame Upgrade 2.1 is compatible with the Full Bear Frame Upgrade 2.0 _
 | Y idler for larger 9mm 2GT belt | [y_idler_9mm_belt](optional_parts/y_idler_9mm_belt/README.md) |
 | Y idler tensioner for E3D idler | [y_idler_tensioner_e3d](optional_parts/y_idler_tensioner_e3d/README.md) |
 | Bear Extruder and X Axis | [Bear Extruder and X axis for MK2.5S MK3S](https://github.com/gregsaun/bear_extruder_and_x_axis) |
-
+| Revo Nozzle Holder | [Revo Nozzle Holder for Bear 2.1](optional_parts/revo_nozzle_holder/README.md) |
 
 
 #### Community's optional parts

optional_parts/revo_nozzle_holder/README.md

@@ -0,0 +1,43 @@
+# Bear Frame Upgrade 2.1
+
+## Revo Nozzle Holder
+
+### Introduction
+
+This is a simple slide-in holder for your E3D Revo series of nozzles.
+It can be installed within a minute, as it only requires you to remove the extrusion endcap.
+
+![Revo Nozzle Holder for Bear 2.1](revo_nozzle_holder.jpg)
+
+### Printed parts
+
+:pushpin: If you have any doubt as to which Bear frame you have, please check the [Bear FAQ here](https://guides.bear-lab.com/Wiki/Bear_FAQ#Section_Which_Bear_frame_do_I_have).
+
+:warning: Warning: It is important to follow the recommended print settings and to **calibrate your extrusion multiplier** before printing the parts (for each and every spool that you use). [Check our calibration guide here](https://guides.bear-lab.com/Guide/Extrusion+multiplier+and+filament+diameter/8).
+
+| Part     | Qty | Note | Download link |
+|----------|:---:|------|---------------|
+| revo_nozzle_holder_bear_v23 | 1 | For Bear 2.1 frame | [revo_nozzle_holder_bear_v23.stl](printed_parts/revo_nozzle_holder_bear_v23.stl?raw=true) |
+
+### Print settings
+
+:warning: Warning: It is important to follow the recommended print settings and to **calibrate your extrusion multiplier** before printing the parts (for each and every spool that you use). [Check our calibration guide here](https://guides.bear-lab.com/Guide/Extrusion+multiplier+and+filament+diameter/8).
+
+  * Slicer : PrusaSlicer recommended
+  * Infill type : Gyroid recommended
+  * Support : No
+  * Brim : No
+  * Detect thin walls : No
+  * Perimeters width (internal and external) : 0.45mm
+
+| Part | Layer<br/>Height<br/>[mm] | Infill [%] | Num.<br/>Perimeters | Num.<br/>Top/Bottom<br/>Layers |
+|:-----|:-------------------------:|:----------:|:-------------------:|:------------------------------:|
+| revo_nozzle_holder_v23   | 0.20 | 15-20 | 2 | 5 |
+
+### Assembly instructions
+
+- Remove the front left extrusion end cap
+- Slide the holder into the front extrusion until it touches the LCD cover on the left
+- Re-install the extrusion end cap
+
+**(The nozzle holder will fill the gap between the end cap and the LCD exactly, so you can also use this nozzle holder to align your LCD!)**