https://youtu.be/bL6KyX030hg I try to design table centerpieces for our holiday parties and "3D Printed Christmas Billboard" is yet another. Pressing the momentary switch on the front of the model presents three Christmas themed images in the style of the old electro mechanical outdoor billboards. The mechanism uses a worm gear driven six slot Geneva wheel to provide dwell, rotation and positioning of the towers. The mechanism also uses magnetics to assist in snapping the panels in place in order to overcome the cumulative backlash from the 3D printed gear train. 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 comment as I do make plenty of mistakes. Designed using Autodesk Fusion 360, sliced using Ultimaker Cura 4.8.0, and 3D printed in Ultimaker PLA and Tough PLA on an Ultimaker 3 Extended and Ultimaker S5s.