Amazon.com: Creality 3D Printer Platform Heated Bed Build Surface Upgrade Tempered Glass Plate for Ender 3/Ender 3 Pro/Ender 3 V2/Ender 5/Ender 5 Pro/CR-20 Pro 3D Printer 235x235x4mm : Industrial & Scientific
Warped glass bed? : r/Ender3S1
Trying a new solution for the badly warped bed. Printed directly on the bed, glass goes over, basically a print in place shim system. We'll see if it works : r/3Dprinting
3D Printing Essentials: How to Succeed with Every Bed Surface Solution | MatterHackers