MGN9C X axis mod for V0.2 (#892)

* Add files for MGN9C X axis mod

* Add close up image

* Create README.md

* Fix incorrect markdown syntax

* Update overview README with V0.2 MGN9C mod

* Clarify usage of hardware in instructions

printer_mods/README.md

@@ -341,6 +341,7 @@ like so:
 | RockNLol | [RockNRoll](./RockNLol/RockNRoll) | Rockers to roll the printer on its back for easier access to the electronics compartment | :x: | :grey_question: | :heavy_check_mark: | :x: | :grey_question: |
 | rngSplat | [Printable Switchwire Deck Plate](./rngSplat/SW_Deck_Plate) | Print a deck plate for Switchwire with debossed Voron logo | :x: | :x: | :x: | :heavy_check_mark: |
 | rsheng118 | [BTT octopus DIN vertical mount](./rsheng118/BTT_octopus_DIN_vertical_mount) | DIN vertical mount for Big Tech Tree Octopus board | :x: | :x: | :heavy_check_mark: | :x: |
+| ruiqimao | [V0.2 MGN9C X Axis](./ruiqimao/V0.2_MGN9C_X) | MGN9C linear rail for the X axis on V0.2 | :heavy_check_mark: | :x: | :x: | :x: | :x: |
 | ryandam | [Cable Management Duct](./ryandam/Cable_management_duct) | Zip tie mount intergrated cable duct to hide your cable | :heavy_check_mark: | :grey_question: | :grey_question: | :grey_question: | :grey_question: |
 |sammynorway | [LGX stealthburner connector cover](./sammynorway/LGX-stealthburner-connector-cover) | Cable cover for LGX and stealthburner | :x: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
 | samwiseg0 | [Microfit 2x3 Skirt Connector (ADXL)](./samwiseg0/microfit_2x3_skirt_connector_adxl) | Mod for a Microfit 2x3 connector to be mounted in a skirt | :x: | :x: | :heavy_check_mark: | :grey_question: | :grey_question: |

printer_mods/ruiqimao/V0.2_MGN9C_X/README.md

@@ -0,0 +1,24 @@
+# MGN9C X Axis for V0.2
+
+This mod replaces:
+
+* The stock MGN7H rail on the V0.2 X axis with an MGN9C rail
+* The stock AB drive frames with modified ones that have additional clearance for the MGN9C carriage
+
+## Additional hardware
+
+In addition to the hardware needed for the stock build:
+
+* 1x MGN9C 150mm linear rail
+* 10x M3x8 BHCS
+* 6x M3 Nuts
+
+## Instructions
+
+Assembly is the mostly the same as the stock V0.2 X axis and AB frames. The MGN9C rail mounts to the X axis extrusion with 6x M3x8 BHCS screws and nuts, and the X carriage mounts to the MGN9C carriage with 4x M3x8 BHCS screws.
+
+![Overview](Images/angle.png)
+
+![Closeup](Images/closeup.png)
+
+![Side](Images/side.png)