https://youtu.be/No4LizqPNbA All of the Marblevators I've designed so far had a mechanism to move a marble from the end of the track to the start of the track. "Marblevator, Tracks" takes a different approach in that the tracks themselves move in concert so that the end of one track meets the start of a second track allowing the marble to transfer to the start of the second track, then the process repeats. To synchronize the tracks, I've utilized a motor speed controller in the design of the model. Subtle adjustments to the speed controller can be made so that the marble seamlessly traverses from one track to the other. Designed using Autodesk Fusion 360, sliced using Ultimaker Cura 4.12.1, and 3D printed in PLA on Ultimaker S5s and an Ultimaker 3e.