Just a quick update from this weekend. I finally got around to installing a proper power supply system in my rack. Now I don't have to take up module space, it's built right into the case.
The PSU is a Meanwell RT-65B, which should have plenty of headroom for all the stuff I cram in here. The bus board has 24 connections. My current rack configuration uses about 20 connectors, so I guess I estimated correctly hehe.
I'm going to be making a second case pretty soon. More to come.