One thing to note: the base enclosure doesn't physically attach to the Argon One case, so I'll probably use a couple of elastic bands to keep them together.
Besides that, this neat little base enclosure is incredibly easy to assemble - no screwdriver needed - and takes no more than 15 minutes to put together. It's an elegant solution for storing the SSD your Pi boots from. I paired it with a short USB-to-SSD cable from The Pi Hut and my desk already looks so much tidier. When I eventually move this setup down to the server room, it'll take up far less space than I expected.