This needs no explanation if you're here, but if you need a refresher, here's the scene:
I saw the original print by idarwl on Thingiverse and had to print it. However, his print is designed for the AMS or MMU, which I do not have, so I modified the original geometry to allow for manual color swaps.
gcode is provided for the MK4 which I modified to need only two color swaps. Start with white, then swap to red, then to blue (or black).
An stl is provided if you'd like to slice yourself and add your own color swaps to.
The author remixed this model.