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Has anyone seen this yet. It's a Road Chain System that drags vehicles around a track using magnets. You 3D print all of the parts, add a 360° servo and boom! Bob's your uncle and you have moving cars and buses and trucks.You can download the parts to 3D print for a small fee here. It costs €4.99 for the 3D printable files. Looks like HO scale but you should be able to resize it to any scale that you want when printing it. You may add as many vehicles as you have spaces for. The servo is hidden in a building beside the road. It's all quite clever. Looks pretty cool! Cheers eh, Todd