Bad business card holder

So I wanted geeky and hacky business card holder.
So I designed one.

Haven't printed it yet, so beware of bugs.
Licensed under GNU GPL v3 and CC-BY-SA 4.0, feel free to embrace the freedom.

Turns out that this design is only looking good while actually feels terrible no matter how and from what it's made. Plastic, glass, steel, aluminum, titanium, paper, resin — tried it all and it just feels wrong.