With the current QUAD SATA Hat you lose access to the GPIO’s, for example the UART0 that is so useful for troubleshooting. Perhaps in a next revision of the product + case you could provide access to the non-used GPIO pins by for example
- providing a 90 degree angled female GPIO-pin block facing the case wall with a slot/opening in the case so you could access the available GPIO positions from the outside
- extending the pins on the top of the HAT and having a small slot/opening in the case so you could connect a ribbon cable to the GPIO pins
- extending the pins on the top of the HAT and extending them with a ribbon cable to the top of the case
What might also be nice is access to the USB C port of the Pi which is able to function in OTG mode.