Issue #115: Add MRP's mini rack system.

README.md

@@ -232,6 +232,7 @@ This section is for _systems_, not individual 3D printable parts. For parts like
   - [Paul Grove's 3D Cube Rack](https://www.printables.com/model/688952-cube-rack-10-inch-network-cabinet-server-rack)
   - [axiopaladin's ButterflyRack - modular, 3D printed frame for metal rails](https://github.com/axiopaladin/ButterflyRack)
   - [Mauker1's Tiny-Rack 6" and 10" 3D Printable Rack Mount System](https://github.com/geerlingguy/mini-rack/issues/105)
+  - [MRP's 3D Printable 10" Mini Rack](https://www.printables.com/model/1173672-10-mini-rack-all-3d-printable)
 
 ### <a name="mini-pc-server-shelves"></a>Mini PC / Server Shelves