Joinable wall chunk (152x121mm)

Initially designed to fit an approximately 18x10 inch hole in a vertical 3x2 grid with some wiggle room. Its really just 2 squares stacked on top of each other at a 10mm offset and one has a 10mm notch cut out of it.

They more or less slot together but require an adhesive or screws to keep them together permanently for any real use.

tinkercad link for easy modification: https://www.tinkercad.com/things/6r8W4SBvmFJ-wall-kit

Edit July-17-20: fixed design flaw by cutting off a chunk that was stopping it from joining together in a certain way.