This project has many similarities to this project: https://www.thingiverse.com/thing:3431438 Is this coincidence or is EnragedRabbit based on smuff?

Please visit the new project website for the latest information on this project.
Introduction
This is how I imagine a multi material feeder / extruder should be. Smart, versatile, reliable and being capable of handling different sorts of materials.
In contrast to other solutions, the SMuFF it's highly scale able. One can use the same base for a 3, 5 or even 9 material machine because of its modularity.
It's also able to replace your standard drive gear and make it a "Bondtech style" extruder, with all the benefits the advanced Bondtech gears will give you.
The SMuFF operates on it's own controller and has a lightweight GCode interpreter built in, which makes interfacing a breeze.
Before you start...
Have a look at the BOM to see which parts are needed. Needless to say that such a device, utilizing Bondtech gears, does not come cheap. A 5 material version will set you back 300-400 money units.
Also, I highly recommend it to experienced makers only. This device is a bit complex. Building and setting it up requires…