Anycubic Kobra manual bed leveling knobs

Hey people! Many of Kobra users asked about possibility to add manual-bed level function. Most kits online are for not-threaded beds using M4 bolts - not suitable for Kobra. Therefore I modeled this simple knobs for it. It's using M3 bolts and nuts. Main use of this mod is to maximize bed flatness and help ABL working better.List of additional parts you need:-4x Springs/Silicone spacers (18mm works fine)-4x Countersunk Hex M3x40mm-4x Standard M3 Nut (2,15mm thickness, flat height 5,5mm)Knobs