Calibration Dice for Dual Extruder Printers

This is an alternative Calibration Cube, thoughted for Dual Extruder Printers, like the Creality CR X.

There are three flavours of the same Dice/Cube.

One of 20mm edge, another of 30mm and finally a big one of 40mm edge.

You shall load into your prefered slicer, two parts. The "Inner Dice XX" and the "Outer Dice XX", where XX is the edge in millimetres for the Dice.

If you use Cura, make sure you use 3.4.1 version. I've tried with 3.6 and 4.0 (beta) and both includes a bug that doesn