Minirack like Argon EON

I quite like the idea of using the [Argon 40 EON](https://argon40.com/en-gb/products/argon-eon-pi-nas) case as the basis of a Raspberry Pi NAS, but that case is not exactly rackable. Does anybody have any suggestions for building something similar but mounted in a 10" minirack?

The EON allows you to attach 2 x 3.5" SATA HDDs and 2 x 2.5" SATA HDDs/SSDs. It also has an RTC, which is nice.

Start by reviewing the Argon 40 EON product page linked in the issue and the repository's existing rack-build documentation. A satisfactory outcome would identify or design a 10" mini-rack-compatible Raspberry Pi NAS supporting two 3.5" and two 2.5" SATA drives plus an RTC, but the issue does not define a specific implementation or acceptance test.

Written by the indexing model from the issue text.