IKEA Billy fixed shelf hack (five rows of LEITZ Folders)

With these drill guides, you can add additional holes for the fixed middle shelf of IKEA Billy. That way, it will hold five rows of file folders (LEITZ® or similar). 

I designed it so you can instantly see if you aligned them wrong - nothing should stick out of the sides.

Align the guide marked „back“ in the first shelfholder-holes ABOVE the existing holes for the fixed shelf. Align the „front“ guide accordingly (you should see two shelfholder-holes below the jig).

Print them in whatever material you want - I used PETG with 0.25mm layer height, 5 perimeters (drills tend to bite into the material, no matter how straight you hold the drill).

You'll need a 5mm drill and a 7,5 mm (or 5/16th) drill.

There is an instructional video on YouTube: