Got a Kryoflux not too long ago and have been looking for a decent cabinet to put my floppy drives in together with the Kryoflux instead of having everything lying around loosely connected on my table.
Last week I got a nice (and free!) small chassis which I think was originally used for an optical drive. Today I finished integrating the Kryoflux, power supply, 5.25" drive and the 3.5" drive on top as seen on the pictures.
I had an external PSU from a faulty external HDD chassis, but the PSU was good and was specced for 5V 2A, 12V 2A, twice of the original PSU in this chassis which was not working well. This PSU is now mounted inside the chassis using a gap pad (thermal) to conduct its heat on to the bottom of the chassis. As mentioned, the Kryoflux is also internal mounted on a bent piece of sheet steel and I made a hole for the USB connector. The 3.5" drive is secured using four screw holes through the top of the chassis so it is not going anywhere.
I think this is a quite nice and small solution and it works well (after some trouble with the flat cable which I had to customize but it is sorted now).
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