Reddit reviews AC Infinity Vented Cantilever 1U Universal Rack Shelf, 14" Deep, for 19" equipment racks. Heavy-Duty 2.4mm Cold Rolled Steel, 60lbs Capacity

I'm all about 3D Printing and creating purpose-built tools, but would it make more sense just to buy a metal rack shelf for $25?

https://www.amazon.com/AC-Infinity-Cantilever-14-Deep/dp/B0773BRBVF/ref=sr_1_5?keywords=rack+shelf&qid=1568759730&sr=8-5

I guess my question was is there a way to have 4 ears (2 in front, 2 in back) for best stability. Pushing it forward would help, and if you had a 2-post rack that would be ideal, but for 4-post it would make sense to have a way to mount to all four posts. For instance I have a 2-ft deep (post to post) rack in my garage, and so having ears that could mount to all four would be way better than only in the front (or only in the rear).

That said, if you using 2U worth of mount points, and you have 3 or 4 screw holes to attach to, and the anchoring to the chassis is strong enough, it may not matter at all. My Cantilever 1U shelf is rated for 60lbs, so maybe I'm just being paranoid.

Would the larger 3-slot version support rack mounting as well?

Regardless - very much appreciate the thought for rack mounting. I think there's a massive hole in the market for rack-mount cases for ITX boards. There's mATX ones like some Rosewill chassis and such, but an ITX gaming PC in a rack form factor seems like a no brainer. Whatever you may think of Linus Tech Tips, they've done a bunch of great videos on rack-mountable systems (including watercooling in rackmount form factors) so they might be interested in checking out one of those cases.

EDIT: It's funny, I've been bugging you about the SM580 for months, then bugging you in the SV590 thread, but it seems like every time you come out with another case concept, it's an even better fit and makes me delay changing my case. :D
I'd rather put my PC in my rack in the garage with fans set to 100% (because I won't hear it!) versus watercooling the whole damn thing.

I need to go clean some things up before I post some awesome photos like everyone else on here, but here's what I use in my entryway coat closet which I've retrofitted to be a server closet (while still serving as a coat closet):

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• Tripp Lite SRW12U SmartRack 12U Low-Profile Switch-Depth Wall-Mount Rack Enclosure Cabinet (I originally ordered from Amazon, but they destroyed it in shipping and then couldn't get a replacement for some time, so I used Wal-Mart after I got refunded from Amazon.)
  
• AC Infinity Vented Cantilever 1U Universal Rack Shelf, 14" Deep, for 19" equipment racks. Heavy-Duty 2.4mm Cold Rolled Steel, 60lbs Capacity - I have 2 of these in the rack so far, and love 'em!
  
• be quiet! Silent Wings 3 120mm PWM High-Speed, BL070, Cooling Fan - excellent, and as the name implies, quiet fans. The reason that I went for the PWM high-speed model is mostly for future-proofing, where I can replace the plug with something that I can tie to temperature and ramp up to high speed when I need to (bonus points if I can tie this to Z-Wave since that's what I run my house on.) For now, they run at full-speed all the time, and it's good enough.
  
• CRJ DC Power Supply for 2 x 3/4-Pin 12V Computer PC Case Fans - for powering both of the "Be Quiet!" fans
  
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  As far as air, electrical, and a ton of Ethernet goes:
  
  
• Air - I use ducts like what you'd find for bathroom exhaust fans that are the same diameter as the vent holes in the server cage. These literally sit on top of the server cage, and come through the sheetrock ceiling and vent into the attic (it's already hot up there and has vents, so I don't really care about venting the heat from the server closet into the attic.) I still need to improve this (e.g. better seals) and waiting for a friend that's *GREAT* with sheetrock to help me on this.
  
• Electrical - I ran Romex down from the attic and mounted an "Old Work" outlet box into the sheetrock, and then had an electrician connect it into my panel. I did this after buddy and I mounted the server cage so that power is directly inside of the cage. The 2 plugs are used: 1 for the server power rack, and the other for the heat exhaust fans.
  
• Ethernet - I used conduit that I cut 2 equal segments of. Like the air ducts, they sit on top of the server cage and go directly into the attic. There's a board that conveniently sits above (I think it's called a "collar tie"?) which I whittled down with a knife, and use to support the weight of the Ethernet cables that loop over it and drop straight into the conduit.
  
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  Since I've had a bitch of a time getting cable run into some of the rooms (for whatever reason, I can't just drop straight down from the ceiling since some boards cross horizontally) then I use MoCA. Specifically, Actiontec MoCA, and then the one that's in the server closet is run PoE via an adapter.

Amazon i got the 14" variant but shorter length are cheaper