Modular hangigng table (timetable,organizer, slots and plates)

I designed table for print tables contest. Let me introduce you to my approach: theme of the contest comes from the name of this webside - prinTABLES. Cover photo suggest, that we have to design table which means flat surface, but it also means excel matrix. So, I was thinking: how to print excel? and I came up with the idea of modular slots for plates, which can be screwed or glued to a wall. 

Why modular? 
So you can print any number of slots and plates to make matrix with desited dimensions.

Why excel/matrix?
Why not? I'm just adding extra step for meaning of the contest xD

What can I do with this project?
Basically everything - from timetable to even hanging chess board (wip).
I will probably use mine for organizing chores.

I can't find plates that suits me. What can I do?
The easiest way is to print blanks and write anything with sharpie. If you know how to use 3D modelling softwares, you can modify blank's STL or STEP. You can also add text or texture directly in Slicer if you are using one which allow you to do such things.

I added it to my workbench, so technically it's table (flat surface) with at least one printed part :D