usermod Carrot_Patch_MultiMOD added

usermods/Carrot_Patch_MultiMOD/README.md

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+
+# Carrot Patch MultiMOD
+[Link to repo](https://github.com/kolbenhans/EnragedRabbitProject/tree/main/usermods/Carrot_Patch_MultiMOD)
+![Carrot_Patch_MultiMOD Assembly](images/CAD_look.png)
+
+## BOM
+- Besides the printed parts you need of course the:
+- 6x 608 bearings
+- 1x 5mm steel rod with a length of 135mm (+ M5 tap) or directly as threaded rod.
+- 2x M5 nuts
+- 6x Pneumatic connector with M6 or M8 thread (choose correct PatchWall files)
+- 4x M3 Threaded inserts
+- 5x Screws M3x20mm + Hex Nuts
+- 4x Screws M3x8mm 
+
+## Additional Information
+- The assembled PatchWall must have a combined theoretical width of 122mm. Due to tolerances, this can deviate and the LockerClips must be selected/changed accordingly. In the folder "optional" are already prepared lengths up to 126mm