3DRC have introduced a belt tensioner for the Serpent Project 4X. The belt tensioner weights only 2 grams and it is designed to be easy to install and to offer a wide range of belt tension adjustment for more efficient drivetrain. The belt tensioner is perfect to calm down the front belt of Serpent Project 4X. The belt tensioner comes without hardware. 2x M3x10mm button head screws, 1x M3x6mm button head screw and 2x 3x6x2.5mm ball bearings are needed. Available through 3DRC´s Shapeways Store or selected hobby shops.