“This was more useful than the 4x option for a couple of RPi4s I put to use and gives the same RPi density. These fit back to back in the DeskPi 10" rack giving the potential to build a 16 RPi cluster in 4U. I'll be buying more!”
“Comes with all the mount hardware, but took me a little while to work it out because of the different sized standoffs - no pictures included. I wanted to mount 2.5" Seagate hard disks on the underside, which I did, but it required some improvisation to stop the Pi mount screws contacting exposed traces on the disk. Should be fine for SSDs in 2.5" enclosures. Now I just need some mounts for Arduino/Pico projects!”