What trackpad is that? Really neat build!

Instead of using xmodmap et al I have opted for using ‘english international’ as keyboard layout and relying on altgr layer to reach the swedish letters I need. Unless I am mistaken the french letters should be there as well. One big benefit of that is its available and works the same for both windows and linux

What is that ring around the usb c socket?

The bracket keys in the middle, are they located to optimize for coding? If so, how do you find it?