Everything was reused parts from my old gaming computer from 5 years ago. I just wanted to test building a small 6.3l cube case (185mm x 185mm x 185mm).
The third pic with the SilverStone SX600 is not this build, but version 2.0? Still, it's similar enough to get the internal layout with me having to shut down and disassemble the other one :P
The SSD is mounted vertically behind the PSU, through the acrylic with slightly longer screws. There is about 5mm of clearance between the top-mounted 25mm thick fan and the top of the PSU.
The main case differences are the top fan port is only 80mm (vs 140mm) on v2.0, to make enough room to mount an ITX sized GPU up high. The side panel has the cutout for the GPU with a fan grill there. I'll have some more pictures of this one once I actually complete it. This one will be easier to photograph since it's clear acrylic :D
The case isn't particularly cost effective, it would be cheaper to buy something... but all the 'cube cases' aren't actually perfect cubes.