https://youtu.be/8CiZmidgpqM "Marblevator, Loop 2" is my second "loop styled" Marblevator. The model is designed to impart just enough energy via a hammer arm and magnetics into an 11mm diameter nylon solid plastic G1 precision ball bearing so that the ball bearing remains in contact with the loop rails to complete the loop. There is a little physics involved in the design, but I'll forgo that and just enjoy watching the mechanism! As usual, I probably forgot a file or two or who knows what else, so if you have any questions, please do not hesitate to ask as I do make plenty of mistakes. Designed using Autodesk Fusion 360, sliced using Ultimaker Cura 4.12.1, and 3D printed in PLA and Tough PLA on Ultimaker S5s.