I saw a bunch of 10in server racks when looking to get started with a HomeLab to tinker. Everything was designed to be printed on an ender 3v2 build plate so some parts have to print solo at an angle to accommodate the bed size. I used overture PLA 

The Lenovo ThinkCentre shelf needed to be split to be printed properly, must glue on(e6000 is what i recommend, it's held for a long time no issues 

everything else was design and print as I went, everything is really beefy on the design front so shelves don't sag at all(aka way over engineered and thicker than needed)

As with anything its a complete work in progress forever and I learned a lot on the way and will continue to tinker with it and allow it to grow 

please leave any feedback as its much appreciated 

There is a small piece to replace cagenuts if you would like to use that 

Also i highly reccomend using metal rails instead of printed ones but a 5u rail is included 

The rails came from Penn Elcom Penn Elcom 6U Full Hole Rack Strip with Square Holes 2mm/0.08" R0863/2MM-06 PennElcomOnline.com

I used standard cage nuts for the front