It's going to live on as a sleeper.
Don't own, and never got into the 3D printer scene. So I won't be doing any cool mods to it. I will probably make a full side, magnetic mesh panel, for it. I have not done any searching yet. I'll see what others are doing with it, that is straight forward. I'd like to add a 120mm intake fan on the front. Looks doable, eyeballing it.
For now, I'll use it with the side panel off.

Old Antec PSU still hums along. They built stuff to last.