Arduino hand programable PLC training station

To properly test my new device I came up with this training station like design that fits in the smallest case I could find. I like how everything fits so well and is so portable now. There is even room for some addons (which I planned because PLC has i2c extension port). But the main benefit of this is that everytime when I make a project like that after some time is put in some sort of box. But now when it has this dust/damage protection it wont get lost anywhere I can return to it when ever I want.