I built a K'nex ball machine that I call Concatenation. It has 3 networks and 10 paths. It doesn't work as well as my other ball machines, but I think it is cool anyway! When building Concatenation, I tried something I had never done before: combining two building systems, K'nex and Tetrix Prime. Tetrix Prime is a building system designed for building robots, but I used it to build parts of Concatenation. I used a mix of my own element designs and other people's element designs. Concatenation uses 12 of my own element designs. The first one is the Inverted Dropper Arm.Click here to see the instructable Concatenation's other elements! I also used elements from Sandroknexmaster and www139. I used the semicircle lift from Tornado96.