Belt Tensioner for CR10S Pro

The CR-10S Pro Dual Z timing belt sync by Urnzwy worked great, but the belt had so little tension on it that it would skip teeth. So, I remixed the tensioner that StvPtrsn made as part of the CR-10 Dual Z Pully Setup. I flipped it, so it attaches on both the top and bottom of the extrusion. It adjusts to get the tension where you want it, and uses a tiny idler pulley:

3mm Bore Aluminum Timing Belt Idler Pulley for 3D Printer 6mm Width

With just a tiny bit of tension to take the slack o