keeping LGX current with MGN12/Trident info and mod (plus some extras) (#596)

* add MGN12/Trident information and mod, also a few helpful extras

* update links

* add SB notes

printer_mods/geoffreyyoung/lgx/README.md

@@ -2,13 +2,18 @@
 
 Useful links, info, and models for using the The LGX™ Large Gears eXtruder with Afterburner...
 
+If you have anything to add/modify/delete hit me up on discord - I'd like to keep this information as useful and current as possible to make LGX life easier for all.
+
 - [Afterburner LGX Mounts](#afterburner-lgx-mounts)
+- [MGN12/Trident X Carriage](#mgn12trident-x-carriage)
+- [Stealthburner](#stealthburner)
 - [Wiring](#wiring)
 - [Klipper config](#klipper-config)
 - [Extra LGX Models](#extra-lgx-models)
   * [LGX Cable Cover](#lgx-cable-cover)
   * [LGX Gear Cover](#lgx-gear-cover)
   * [LGX Lever Cover](#lgx-lever-cover)
+  * [30mm Mount Screws](#30mm-mount-screws)
 
 ---
 
@@ -23,7 +28,22 @@ These models are pinned in the [#voronuser_mods](https://discord.com/channels/46
 
 Thanks to `@Nemgrea V2.199 V0.000` and the crew for their efforts designing and testing the mounts, and offering them to the community.
 
-<sub>*Aside: For my own build, I found that my third-party M3x20 screws had a large enough head that the toolhead couldn't mount to the X Carriage assembly properly without a bit more clearance.  If you find yourself in this situation, [this mod of @Nemgrea's mount](STLs/lgx_AftB_Mount_Front-extra_clearance.stl) is nearly identical to the one on Discord but with slightly more clearance for the bottom screws.  Please try the (semi)official one first before using this mod :)*</sub>
+### MGN12/Trident X Carriage
+
+The above Afterburner mounts will work without alteration in the current MGN12/Trident x carriage.  However, once the rear mount is installed you can no longer access the linear rail block screws.  This mod to the rear mount addresses that.
+
+  * [`lgx-mgn12-mount-rear.stl`](STLs/mgn12/lgx-mgn12-mount-rear.stl)
+
+![mgn12-rear.jpg](images/mgn12-rear.jpg)
+
+### Stealthburner
+
+**The Stealthburner beta does not include support for LGX.**
+
+Please don't ask the Stealthburner crew about LGX support, LGX mounts, etc - they have plenty of other Stealthburner things to focus on :)
+
+That said, a number of people are unofficialy running LGX with Stealthburner using the Afterburner mounts.
+
 
 ### Wiring
 
@@ -74,7 +94,7 @@ The `either...or` warning is not from Bondtech, but provided here to honor the m
 
 Besides the mounting parts, most people end up asking about a cable cover.  There are a few posted around Discord, but after seeing [Craxoor's PCB cover](https://github.com/craxoor/VoronMods/tree/master/PCB%20Cover) I designed a similar cover from scratch for use with the LGX.  Note that this cover *does not* work with the toolhead PCB - it just looks similar.
 
-  * [`lgx-cable-cover.stl`](STLs/lgx-cable-cover.stl)
+  * [`lgx-cable-cover.stl`](STLs/extras/lgx-cable-cover.stl)
 
 ![cable_cover.jpg](images/cable_cover.jpg)
 
@@ -84,7 +104,7 @@ Besides the mounting parts, most people end up asking about a cable cover.  Ther
 
 A little cover for the Large Gears on the LGX so it doesn't chew through the fan wires.
 
-  * [`lgx-gear-cover.stl`](STLs/lgx-gear-cover.stl)
+  * [`lgx-gear-cover.stl`](STLs/extras/lgx-gear-cover.stl)
 
 ![gear_cover.jpg](images/gear_cover.jpg)
 
@@ -92,6 +112,14 @@ A little cover for the Large Gears on the LGX so it doesn't chew through the fan
 
 Drop-in replacement for the filament pre-tension lever, in case you want a different color:
 
-  * [`lgx-lever-cover.stl`](STLs/lgx-lever-cover.stl)
+  * [`lgx-lever-cover.stl`](STLs/extras/lgx-lever-cover.stl)
 
 ![lever_cover.jpg](images/lever_cover.jpg)
+
+#### 30mm Mount Screws
+
+I stripped one of the M3x27 low-profile screws that came with the LGX, and have yet to find replacements.  To keep going, I made some adjustments to the front mount and blower housing to accommodate standard M3x30 screws.
+
+  * [`30mm-lgx-mount-front.stl`](STLs/30mm-screws/30mm-lgx-mount-front.stl)
+  * [`30mm-lgx-blower-housing-rear.stl`](STLs/30mm-screws/30mm-lgx-blower-housing-rear.stl)
+