The mission is to feed empty toilet rolls into the machine, wind them up with toilet tissue and then eject a finished TP-roll. Simple, right?

It would probably take a lifetime if it wasnt for modern 3D CAD modeling. 

Most parts can be 3D-printed which makes replication easier and ofcourse open source when it eventually will be finished. Can you make out how it will work by looking at the model? The slide with the motors on the right will push new rolls to the left and when the paper gets cut and the motor returns back the roll will chute down and out, ready for "assumption" (short for ass-consumption)