Slightly taller bottom stepper brackets / legs for the Rostock-Mini.
I mounted a standard RAMPS board under the base of my Rostock-Mini, and it fit, but the wires would hit the table. I decided I wanted an extra 20 mm of height, so I modified the standard Rostock-Mini stepper brackets / legs to be slightly higher.
Print. Drill out the 8mm holes with a 5/16 drill, drill out the 4mm holes with a 1/8 drill and then tap using an M4 tap. Install.
If you are using 12mm M3 screws with washers to clamp down on the smooth rods, you will NEED to melt the nuts into the part to get them close enough to mesh with the bolts. You will probably also have to use 16mm screws combined with pliers and clamps to get the 12mm screws to connect to the nuts one at a time.
If you use 16mm M3 screws they will stick out past the nuts slightly, but are MUCH easier to install.