Power Supply for Low Profile Case

Hi Everyone

I'm considering building a super shallow case and am wondering if anyone has suggestions for good power options.

I am currently using Befaco Trolly Bus and am quite happy with them, but they are too bulky for what I am envisioning.

I somehow distrust flying bus cables, but maybe this is the way to go? Is there any principled reason that distribution boards are better than flying cables?

I really love how the Stormnest deals with power, I'd like to do something similar, the case they offer is too small to be useful to me.

If anyone has products they like and trust, please do share.