Hictop Dual Extrusion with mostly stock parts

I bought a few Hictop Prusa i3s (3DP-11) and replaced the hotends on two of them with E3D V6s. Because of this I had some stock parts left over, and before throwing them in a box, I got to playing around with them and realized it would be quite easy to upgrade these stock parts to dual extrusion.

The only catch of this system is that it requires Bowden extruders. However, these are quite easy to print and assemble or to purchase directly. I used this one:
https://www.thingiverse.com/thing:13