Seeing the final picture made me think of something: one of my "life hacks" is to not accept cables that are too long. I used to think the longer the better, and just coil it up or something. But long cables just get in the way and collect dust etc.
If something is going to be considered permanent, cut that cable down to length. Either buy shorter moulded cables, or learn to wire cables yourself. Too often have I left a cable long "just in case" only for it to get in the way for years to come.
For patch cables it's easiest and best to buy moulded cables that fit your rack. For things like power cables (extension leads etc.) it's easiest to wire them yourself (at least, in the UK where our plugs are designed to be wired by anyone).
I am very much on board with this line of thinking. Because things are still somewhat in flux, it was much easier to plan for excess cabling and have a place for that cabling to live in the rack so that things can be moved if needed. I'll probably re-cable it with cut-to-length cables in the future.
One thing that I haven't found a solution for though: I have a lot of USB and HDMI cable coiled up behind the Beelink boxes (for KVM connectivity). I've found the normal length cables (1', 3', 6', etc), but I haven't been able to find custom length cables for those specific connections. Do you happen to know anywhere I can find those?
On the other hand, I did this, cut my cables, and after I needed to reorganise things slightly, it was very difficult, even a centimetre was at luxury. Also, when I need to move a computer for some reason, there’s no room, at all. These days, I’m trying to leave at least some extra cm (usually that’s an inch or two, depending on their location) for that. I’d do very tight cable cut only for situations when I’m super sure nothing will ever move. Again, even then, I’d rather leave some extra inch, just in case.