CyberBrick train base compatible with Duplo

This is a CyberBrick train base fully compatible with Duplo. Controls are fairly simple. Use the handle for precise control or use the button for a set speed. My son has extensively tested it. Works with the a original top or a printed one, such as: https://makerworld.com/en/models/410901-duplo-thomas-the-tank-engine-for-10874-10875?from=search#profileId-683953https://makerworld.com/en/models/384371-train-locomotive-compatible-with-brick-dupl0?from=search#profileId-284522Many others on MakerWorld All parts except the rubber band are part of the CyberBrick Beginner Hardware Kit For the gearbox assembly, check the instructions of the official CyberBrick Truck https://makerworld.com/en/models/1396031-cyberbrick-official-truck