DIY 3 Speed Gearbox

Amazing 3 speed gearbox - DIY from cardboard. In this video I will guide you gearbox build with 3 speed transmission from cardboard. This is a RC 3 speed gearbox, it active amazing. Hope you like speed gearbox it. Thank you! Materials you need: cardboard, 1 motor down speed DC 9v, 1 switch, battery, aluminum bars, bamboo skewers, hot glue gun...... and follow all steps from this video and you will get amazing #speedgearbox with #3speedtransmission. If you like this video don’t forget to subscribe :). Th