Building into this was fun. There is absolutely no extra space, but everything still fits nicely.
The front panel USB-C plug has a cable that don't fit to the motherboard (Gigabyte B550I Aorus Pro AX), at least without an adapter (which I didn't find - maybe someone can point one out in a reply?).
CPU cooler I used is Alpenföhn Black Ridge. Since all reviews of this suggested to swap out the cooler with a Noctua 9x14, I did this. I thought of using that surplus stock cooler as chassis fan under the motherboard. It fit just, but the fan could not spin. Maybe another Noctua 9x14 would?
When idle, the box is almost silent (Ryzen 3800XT, Nvidia 3060Ti). Under load it sounds like a real computer.