A remix of CloakedWayne's sheet metal Monolith Gantry using 3030 extrusions and MGN12H Y-axis rails, that allow it to be installed on Ratrig V-Core 3/3.1/4 and other 3030 frame 3D printers.

Changes compared to the original:
- 3030 extrusions and M8 screws for better rigidity
- MGN12H rails on Y axis (due to MGN9 being incompatible with 3030)
- X axis flipped by default, for use with CPAP toolheads like Gustav or Archetype Breakneck
The default size implies a 350x350mm build area, and has 361mm of Y axis travel.
As for now, the only version available is 9/10mm 2WD with decoupled motor mounts.
BOM, non-decoupled motor mounts, and an AWD version will be added soon. Due to high rigidity, 9mm GT3 belts are recommended.