This is a remix from Littlefiver. I kept all the dimensions of the drawers and case but replaced each drawer handle with a square recess to accept a knob. The Knobs fit tightly without any glue or screws but I made it possible to use a screw about 2.4mm wide and 14mm long if necessary.

**This design does not fit the Ender 3 Pro or Ender 3 Plus.

**I recommend printing the drawers (just the red parts) at 100% infill. It's faster because the extruder won't have to zig-zag.

**Some Ender 3's are assembled differently than others. If the bed rollers have the head of the bolt on the bottom they are fine. If the bed rollers have nuts on the bottom they will collide with the drawer. You can simply take the bed off and reinstall the bed roller bolts.