those distros are gonna be everywhere soon, they make everything so easy.
however, they do kinda remove the ability to customize to your heart's content. The wires only go in one place, & your tubing options are gonna be pretty apparent the minute you get it in & finally visually understand what's going on.
to make one?
... sounds like you've got a lot of time on your hands.
I can't remember who did it, but a few people custom built these long before it became a fashion fad. I think Singularity was one of them. They had incredibly detailed build logs with how they did it.
R.I.P. Zawarudo, may you OC angels' wings in heaven.