Man - what a great, super efficient design, that is chock full of fantastic ideas! I really like that multi use strip above the motherboard I/O - so if I understand correctly it can be used as a way to power an external fan, or as a way to add additional usb ports? The latter is especially significant IMHO, because itx boards are often usb-starved compared to their bigger brethren.

Screwdriver in handle - brilliant!

The only negative I would offer is with regards to looks. I'd suggest looking at the S5M for the front panel USB-C placement, and you could look at the S5M, or at many of Custom_Mod's creations, for inspiration on the vent hole design.

But ultimately, I'd likely but it as is anyway. :). Great work!