Drawer for under desk corner, will fit 1-4-6 gridfinity, or any other box of 167x46x42mm dimensions with 0.5mm tolerance for clearance, longer if you don't mind end sticking out of the back of it.

PLA print settings
Layer Height: 0.2mm.
Orientation: Depends on whether you want left or right hand; the model suits both. For a left-hand orientation, flip it 180° to get the right-hand version.
Support: Not needed as long as you print with the face facing upward. Using the wrong orientation might still work, but it's not suggested.
Holes:

• 4mm for screws.
• 8mm hole for the screwdriver to fit through.

After printing, you can add another shape to the existing hole on the surface for example, a headset holder can be found here
Horizontal version can be found here
If you'd like a handle that fits it and the boxes, you can find that here

Fits: A1 mini.

While drawer is my design, the Gridfinity platform is created by Zack Freedman.