About this 3D model

We bought lots of white ABS with our shapercube.. Lots. But who wants to print everything in white? After a while that got a bit.. samey. So, an experiment, jam a coloured marker in the feedstock inlet and see what happens. What happened was, coloured prints came out. So the idea for the marker organ was born, a way to attached several coloured markers to the feedstock, and pick which one, or combination, is colouring the plastic. This is the first attempt, a simple clamp over the feedstock which holds a single marker against it.