Update 6.22.2022

DeskNano Prototype Rev 2.0
The DeskNano prototype has been overhauled to rev 2.0, with many small but important changes to all parts.
The exterior remains similar, but fitment is visibly improved.
On the left is v1.0 and on the right is v2.0.

DeskNano NAS Edition
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Storage Bay v1.0 - External Side w/ Mesh
The storage bay has been prototyped. It supports 2x 15mm drives with optional breathable mesh or active cooling.

Storage Bay v1.0 - Internal Side w/ Fan

Storage Bay v1.0 - Installed
The total width with the storage bay is still ~10mm less than the original chassis.
Active cooling with 120mm or 140mm fans is supported in order to get airflow to the M.2 area.

Rear m.2 area
Installing the secondary fan cable can be done without any major disassembly of the chassis. It will only require loosening two lid screws, elevating the rear panel off it's standoffs, feeding the cable through the i/o area.

Allowing for a clean look.

Completed Installation[/SPOILER]
New CPU Cooler Support
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DeskNano now supports Wraith Stealth and 120mm fans. The Wraith Stealth comes with Ryzen APU's but doesn't fit in the stock chassis. So if you don't have a Noctua L9a yet, you'll get similar performance from the Wraith Stealth, and won't have to buy the $50 Noctua.

Wraith Stealth
Also supported are 120mm l9a swaps - either slim version, or standard 25mm by scaling the design's Z-height. This configuration can be useful when overclocking memory. Slightly higher core temperatures (but still within tolerance for single core loads) but massively improved memory and VRM cooling.

Scythe Kaze 120mm x15 swap
Scythe Kaze 120mm x15 swap
This 120mm lid design relies on a simple "press-fit" into place, held by the compression of the rubber anti-vibration pads. This frees up their hole pattern for a mesh or fan grille if you prefer.

120mm w/ Mesh Grille
It's also possible to fit much larger coolers with the 120mm cutout, such as the Wraith Prism, Blackridge, etc. It will be quite easy to design your own custom lid to fit any cooler you want.
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Next Revision
The switch area is in need of redesign for better compatibility, since it's currently causing a defect in the attachment system. I am waiting to receive the new low profile switches I need to fix this. Any feedback is welcome on design or features.