Summary

I used a breadboard to prototype my thing https://www.thingiverse.com/thing:4848322 (Wemos D1 Mini OLED Wedge (Updated Design)). The prototype board itself ended up looking neat enough that I've just left it on my desk.

But the angle of the OLED screen was hard to see... So I went looking and found https://www.thingiverse.com/thing:2415668 which I liked and remixed it to create this simple angled breadboard holder.

My breadboard was the same width as the original creator but was slightly longer so I had to stretch it just slightly. I used TinkerCad to remix it. I've included the STL and the OBJ in case that is useful for anyone.